{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-30934", "tracking": { "current_release_date": "2026-03-26T01:23:24.347175Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-30934", "initial_release_date": "2026-03-09T21:11:55.843424Z", "revision_history": [ { "date": "2026-03-09T21:11:55.843424Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)." }, { "date": "2026-03-09T21:12:02.310904Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-10T00:12:33.439705Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-10T00:12:43.323657Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-10T16:39:16.296059Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-10T16:39:21.193985Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-10T17:39:51.103430Z", "number": "7", "summary": "Unknown change." }, { "date": "2026-03-10T18:37:04.065259Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-10T18:37:07.973110Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-03-10T19:58:28.267372Z", "number": "10", "summary": "References created (1)." }, { "date": "2026-03-11T00:13:51.722741Z", "number": "11", "summary": "References created (1)." }, { "date": "2026-03-11T14:54:59.883348Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-11T14:55:03.406461Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-03-18T17:26:13.793849Z", "number": "14", "summary": "Products connected (3).| Product Identifiers created (3).| Exploits created (1)." }, { "date": "2026-03-18T17:26:15.771332Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-03-19T15:28:53.908949Z", "number": "16", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)." }, { "date": "2026-03-20T09:33:34.979489Z", "number": "17", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-25T18:13:57.555454Z", "number": "18", "summary": "References created (1)." }, { "date": "2026-03-25T18:13:59.382990Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-03-25T18:15:07.830983Z", "number": "20", "summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (4)." }, { "date": "2026-03-25T21:42:47.488904Z", "number": "21", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (11).| Products created (1).| References created (5).| CWES updated (1)." } ], "status": "interim", "version": "21" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.2.1-stable", "product": { "name": "vers:unknown/1.2.1-stable", "product_id": "CSAFPID-5844599", "product_identification_helper": { "cpe": "cpe:2.3:a:filebrowser:filebrowser:1.2.1:stable:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/1.3.0-beta", "product": { "name": "vers:unknown/1.3.0-beta", "product_id": "CSAFPID-5844600", "product_identification_helper": { "cpe": "cpe:2.3:a:filebrowser:filebrowser:1.3.0:beta:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/<=1.2.9", "product": { "name": "vers:unknown/<=1.2.9", "product_id": "CSAFPID-5844598", "product_identification_helper": { "cpe": "cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "File Browser" } ], "category": "vendor", "name": "File Browser" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<1.2.2-stable", "product": { "name": "vers:unknown/<1.2.2-stable", "product_id": "CSAFPID-5775114" } }, { "category": "product_version_range", "name": "vers:unknown/>=0|<0.0.0-20260307130210-09713b32a5f6", "product": { "name": "vers:unknown/>=0|<0.0.0-20260307130210-09713b32a5f6", "product_id": "CSAFPID-5772747" } }, { "category": "product_version_range", "name": "vers:unknown/>=1.3.0-beta|<1.3.1-beta", "product": { "name": "vers:unknown/>=1.3.0-beta|<1.3.1-beta", "product_id": "CSAFPID-5775111" } }, { "category": "product_version_range", "name": "vers:unknown/v0.3.4", "product": { "name": "vers:unknown/v0.3.4", "product_id": "CSAFPID-5723361" } }, { "category": "product_version_range", "name": "vers:unknown/v0.3.6-beta", "product": { "name": "vers:unknown/v0.3.6-beta", "product_id": "CSAFPID-5723362" } }, { "category": "product_version_range", "name": "vers:unknown/v0.3.7-beta", "product": { "name": "vers:unknown/v0.3.7-beta", "product_id": "CSAFPID-5723363" } }, { "category": "product_version_range", "name": "vers:unknown/v0.4.0-beta", "product": { "name": "vers:unknown/v0.4.0-beta", "product_id": "CSAFPID-5723364" } }, { "category": "product_version_range", "name": "vers:unknown/v0.4.1-beta", "product": { "name": "vers:unknown/v0.4.1-beta", "product_id": "CSAFPID-5723365" } }, { "category": "product_version_range", "name": "vers:unknown/v0.4.2-beta", "product": { "name": "vers:unknown/v0.4.2-beta", "product_id": "CSAFPID-5723366" } }, { "category": "product_version_range", "name": "vers:unknown/v0.5.0-beta", "product": { "name": "vers:unknown/v0.5.0-beta", "product_id": "CSAFPID-5723367" } }, { "category": "product_version_range", "name": "vers:unknown/v0.5.1-beta", "product": { "name": "vers:unknown/v0.5.1-beta", "product_id": "CSAFPID-5723368" } }, { "category": "product_version_range", "name": "vers:unknown/v0.5.2-beta", "product": { "name": "vers:unknown/v0.5.2-beta", "product_id": "CSAFPID-5723369" } }, { "category": "product_version_range", "name": "vers:unknown/v0.7.6-beta", "product": { "name": "vers:unknown/v0.7.6-beta", "product_id": "CSAFPID-5723370" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.1-stable", "product": { "name": "vers:unknown/v1.0.1-stable", "product_id": "CSAFPID-5723371" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.1-stable", "product": { "name": "vers:unknown/v1.2.1-stable", "product_id": "CSAFPID-5910236" } } ], "category": "product_name", "name": "filebrowser" } ], "category": "vendor", "name": "gtsteffaniak" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-30934", "cwe": { "id": "CWE-79", "name": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')" }, "notes": [ { "category": "description", "text": "## Summary\nStored XSS is possible via share metadata fields (e.g., `title`, `description`) that are rendered into HTML for `/public/share/` without context-aware escaping. The server uses `text/template` instead of `html/template`, allowing injected scripts to execute when victims visit the share URL.\n\n## Details\nThe server renders `public/index.html` using `text/template` and injects user-controlled share fields (title/description/etc.) into HTML contexts. `text/template` does not perform HTML contextual escaping like `html/template`. Because share metadata is persistent, the payload becomes stored and executes whenever a victim opens the affected share page.\n\nRelevant code paths:\n- `backend/http/static.go` (template rendering and share metadata assignment)\n- `backend/http/httpRouter.go` (template initialization)\n- `frontend/public/index.html` (insertion points for title/description and related fields)\n\n## PoC\n1. Login as a user with share creation permission.\n2. Create a share (`POST /api/share`) with malicious metadata:\n - `title = `\n3. Open the resulting `/public/share/<hash>` URL in a browser.\n4. **Expected:** Payload is safely escaped and displayed as text.\n5. **Actual:** JavaScript executes in victim's browser (stored XSS).\n\nTested on Docker image: `gtstef/filebrowser:stable` (version `v1.2.1-stable`).\n\n## Impact\n- Arbitrary script execution in application origin.\n- Potential account/session compromise, CSRF-like action execution, data exfiltration from authenticated contexts.\n- Affects anyone (including unauthenticated visitors) opening the malicious share URL.\n- The XSS is stored and persistent — no social engineering beyond sharing the link is required.", "title": "github - https://github.com/advisories/GHSA-r633-fcgp-m532" }, { "category": "description", "text": "## Summary\nStored XSS is possible via share metadata fields (e.g., `title`, `description`) that are rendered into HTML for `/public/share/<hash>` without context-aware escaping. The server uses `text/template` instead of `html/template`, allowing injected scripts to execute when victims visit the share URL.\n\n## Details\nThe server renders `public/index.html` using `text/template` and injects user-controlled share fields (title/description/etc.) into HTML contexts. `text/template` does not perform HTML contextual escaping like `html/template`. Because share metadata is persistent, the payload becomes stored and executes whenever a victim opens the affected share page.\n\nRelevant code paths:\n- `backend/http/static.go` (template rendering and share metadata assignment)\n- `backend/http/httpRouter.go` (template initialization)\n- `frontend/public/index.html` (insertion points for title/description and related fields)\n\n## PoC\n1. Login as a user with share creation permission.\n2. Create a share (`POST /api/share`) with malicious metadata:\n - `title = `\n3. Open the resulting `/public/share/<hash>` URL in a browser.\n4. **Expected:** Payload is safely escaped and displayed as text.\n5. **Actual:** JavaScript executes in victim's browser (stored XSS).\n\nTested on Docker image: `gtstef/filebrowser:stable` (version `v1.2.1-stable`).\n\n## Impact\n- Arbitrary script execution in application origin.\n- Potential account/session compromise, CSRF-like action execution, data exfiltration from authenticated contexts.\n- Affects anyone (including unauthenticated visitors) opening the malicious share URL.\n- The XSS is stored and persistent — no social engineering beyond sharing the link is required.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-r633-fcgp-m532.json?alt=media" }, { "category": "description", "text": "FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-30934" }, { "category": "description", "text": "FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-30934" }, { "category": "description", "text": "## Summary\nStored XSS is possible via share metadata fields (e.g., `title`, `description`) that are rendered into HTML for `/public/share/<hash>` without context-aware escaping. The server uses `text/template` instead of `html/template`, allowing injected scripts to execute when victims visit the share URL.\n\n## Details\nThe server renders `public/index.html` using `text/template` and injects user-controlled share fields (title/description/etc.) into HTML contexts. `text/template` does not perform HTML contextual escaping like `html/template`. Because share metadata is persistent, the payload becomes stored and executes whenever a victim opens the affected share page.\n\nRelevant code paths:\n- `backend/http/static.go` (template rendering and share metadata assignment)\n- `backend/http/httpRouter.go` (template initialization)\n- `frontend/public/index.html` (insertion points for title/description and related fields)\n\n## PoC\n1. Login as a user with share creation permission.\n2. Create a share (`POST /api/share`) with malicious metadata:\n - `title = `\n3. Open the resulting `/public/share/<hash>` URL in a browser.\n4. **Expected:** Payload is safely escaped and displayed as text.\n5. **Actual:** JavaScript executes in victim's browser (stored XSS).\n\nTested on Docker image: `gtstef/filebrowser:stable` (version `v1.2.1-stable`).\n\n## Impact\n- Arbitrary script execution in application origin.\n- Potential account/session compromise, CSRF-like action execution, data exfiltration from authenticated contexts.\n- Affects anyone (including unauthenticated visitors) opening the malicious share URL.\n- The XSS is stored and persistent — no social engineering beyond sharing the link is required.", "title": "github - https://api.github.com/advisories/GHSA-r633-fcgp-m532" }, { "category": "description", "text": "FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) in github.com/gtsteffaniak/filebrowser", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4660.json?alt=media" }, { "category": "description", "text": "FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-30934.json?alt=media" }, { "category": "other", "text": "0.00032", "title": "EPSS" }, { "category": "other", "text": "3.7", "title": "NCSC Score" }, { "category": "other", "text": "Is related to (a version of) an uncommon product, There is exploit data available from source Nvd", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5772747", "CSAFPID-5775111", "CSAFPID-5775114", "CSAFPID-5844598", "CSAFPID-5844599", "CSAFPID-5844600", "CSAFPID-5723361", "CSAFPID-5723362", "CSAFPID-5723363", "CSAFPID-5723364", "CSAFPID-5723365", "CSAFPID-5723366", "CSAFPID-5723367", "CSAFPID-5723368", "CSAFPID-5723369", "CSAFPID-5723370", "CSAFPID-5723371", "CSAFPID-5910236" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-r633-fcgp-m532" }, { "category": "external", "summary": "Source raw - github", "url": "https://api.github.com/advisories/GHSA-r633-fcgp-m532" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-r633-fcgp-m532.json?alt=media" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-30934" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/30xxx/CVE-2026-30934.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30934" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-30934" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-30934" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-r633-fcgp-m532" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4660.json?alt=media" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-30934.json?alt=media" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.2.2-stable" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.1-beta" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-r633-fcgp-m532" }, { "category": "external", "summary": "Reference - github; osv", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30934" }, { "category": "external", "summary": "Reference - osv", "url": "https://pkg.go.dev/vuln/GO-2026-4660" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30934.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L", "baseScore": 8.9, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-5723361", "CSAFPID-5723362", "CSAFPID-5723363", "CSAFPID-5723364", "CSAFPID-5723365", "CSAFPID-5723366", "CSAFPID-5723367", "CSAFPID-5723368", "CSAFPID-5723369", "CSAFPID-5723370", "CSAFPID-5723371", "CSAFPID-5772747", "CSAFPID-5775111", "CSAFPID-5775114", "CSAFPID-5844598", "CSAFPID-5844599", "CSAFPID-5844600", "CSAFPID-5910236" ] } ], "title": "CVE-2026-30934" } ] }