{
"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-2026-34394",
"tracking": {
"current_release_date": "2026-04-01T23:27:01.898855Z",
"generator": {
"date": "2026-02-17T15:00:00Z",
"engine": {
"name": "V.E.L.M.A",
"version": "1.7"
}
},
"id": "CVE-2026-34394",
"initial_release_date": "2026-03-31T21:26:15.364313Z",
"revision_history": [
{
"date": "2026-03-31T21:26:15.364313Z",
"number": "1",
"summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-31T21:26:17.525058Z",
"number": "2",
"summary": "NCSC Score created."
},
{
"date": "2026-03-31T21:39:25.066077Z",
"number": "3",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-31T21:39:27.808710Z",
"number": "4",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-31T23:58:23.070490Z",
"number": "5",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)."
},
{
"date": "2026-03-31T23:58:25.411883Z",
"number": "6",
"summary": "NCSC Score updated."
},
{
"date": "2026-04-01T14:40:10.477032Z",
"number": "7",
"summary": "Unknown change."
},
{
"date": "2026-04-01T14:40:12.506714Z",
"number": "8",
"summary": "NCSC Score updated."
},
{
"date": "2026-04-01T15:12:50.244756Z",
"number": "9",
"summary": "Source connected.| CVE status created. (valid)| EPSS created."
},
{
"date": "2026-04-01T15:13:08.964560Z",
"number": "10",
"summary": "NCSC Score updated."
},
{
"date": "2026-04-01T23:26:21.163678Z",
"number": "11",
"summary": "Products connected (1).| Product Identifiers created (1).| Exploits created (1)."
},
{
"date": "2026-04-01T23:26:23.333301Z",
"number": "12",
"summary": "NCSC Score updated."
}
],
"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"
}
],
"category": "vendor",
"name": "WWBN"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-34394",
"cwe": {
"id": "CWE-352",
"name": "Cross-Site Request Forgery (CSRF)"
},
"notes": [
{
"category": "description",
"text": "WWBN AVideo is an open source video platform. In versions 26.0 and prior, AVideo's admin plugin configuration endpoint (admin/save.json.php) lacks any CSRF token validation. There is no call to isGlobalTokenValid() or verifyToken() before processing the request. Combined with the application's explicit SameSite=None cookie policy, an attacker can forge cross-origin POST requests from a malicious page to overwrite arbitrary plugin settings on a victim administrator's session. Because the plugins table is included in the ignoreTableSecurityCheck() array in objects/Object.php, standard table-level access controls are also bypassed. This allows a complete takeover of platform functionality by reconfiguring payment processors, authentication providers, cloud storage credentials, and more. At time of publication, there are no publicly available patches.",
"title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34394"
},
{
"category": "description",
"text": "WWBN AVideo is an open source video platform. In versions 26.0 and prior, AVideo's admin plugin configuration endpoint (admin/save.json.php) lacks any CSRF token validation. There is no call to isGlobalTokenValid() or verifyToken() before processing the request. Combined with the application's explicit SameSite=None cookie policy, an attacker can forge cross-origin POST requests from a malicious page to overwrite arbitrary plugin settings on a victim administrator's session. Because the plugins table is included in the ignoreTableSecurityCheck() array in objects/Object.php, standard table-level access controls are also bypassed. This allows a complete takeover of platform functionality by reconfiguring payment processors, authentication providers, cloud storage credentials, and more. At time of publication, there are no publicly available patches.",
"title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/34xxx/CVE-2026-34394.json"
},
{
"category": "description",
"text": "## Summary\n\nAVideo's admin plugin configuration endpoint (`admin/save.json.php`) lacks any CSRF token validation. There is no call to `isGlobalTokenValid()` or `verifyToken()` before processing the request. Combined with the application's explicit SameSite=None cookie policy, an attacker can forge cross-origin POST requests from a malicious page to overwrite arbitrary plugin settings on a victim administrator's session.\n\nBecause the `plugins` table is included in the `ignoreTableSecurityCheck()` array in `objects/Object.php`, standard table-level access controls are also bypassed. This allows a complete takeover of platform functionality by reconfiguring payment processors, authentication providers, cloud storage credentials, and more.\n\n## Details\n\nThe session cookie configuration in `objects/include_config.php` at line 135 explicitly weakens the default browser protections:\n\n```php\n// objects/include_config.php:135\nini_set('session.cookie_samesite', 'None');\n```\n\nThis means cookies are attached to all cross-origin requests, making CSRF attacks trivial.\n\nThe save endpoint in `admin/save.json.php` directly processes POST data without any token verification:\n\n```php\n// admin/save.json.php\n$pluginName = $_POST['pluginName'];\n$pluginValues = $_POST;\n// ...\n$pluginDO->$key = $pluginValues[$key];\n$p->setObject_data(json_encode($pluginDO));\n$p->save();\n```\n\nThe `plugins` table is explicitly exempted from security checks in `objects/Object.php` at line 529:\n\n```php\n// objects/Object.php:529\nstatic function ignoreTableSecurityCheck() {\n return ['plugins', /* ... other tables ... */];\n}\n```\n\nEven the ORM-level protections that exist for other tables do not apply to plugin configuration writes.\n\n## Proof of Concept\n\nHost the following HTML on an attacker-controlled domain. When a logged-in AVideo administrator visits this page, their PayPal receiver email is silently changed to the attacker's address:\n\n```html\n\n\nLoading...\n\n\n\n\n\n```\n\nTo overwrite S3 storage credentials instead:\n\n```html\n\n```\n\nReproduction steps:\n\n1. Log in to AVideo as an administrator.\n2. In a separate browser tab, open the attacker's HTML page.\n3. The form auto-submits, overwriting the target plugin configuration.\n4. Verify the change by navigating to the plugin settings page in the admin panel.\n\n## Impact\n\nAn attacker can silently reconfigure any plugin on the AVideo platform by tricking an administrator into visiting a malicious page. Exploitable configurations include:\n\n- **Payment hijacking**: Change PayPal receiver email or Stripe keys to redirect all payments to the attacker.\n- **Credential theft**: Replace S3 bucket credentials so uploaded media is sent to attacker-controlled storage.\n- **Authentication bypass**: Modify LDAP/OAuth plugin settings to point at attacker-controlled identity providers.\n- **Backdoor installation**: Enable and configure plugins to introduce persistent access.\n\nThis is a full platform takeover with zero user interaction beyond a single page visit.\n\n- **CWE**: CWE-352 (Cross-Site Request Forgery)\n\n## Recommended Fix\n\nAdd CSRF token validation at `admin/save.json.php:10`, immediately after the admin check:\n\n```php\n// admin/save.json.php:10\nif (!isGlobalTokenValid()) {\n die('{\"error\":\"Invalid CSRF token\"}');\n}\n```\n\n---\n*Found by [aisafe.io](https://aisafe.io)*",
"title": "github - https://api.github.com/advisories/GHSA-4wwr-7h7c-chqr"
},
{
"category": "other",
"text": "0.00016",
"title": "EPSS"
},
{
"category": "other",
"text": "3.3",
"title": "NCSC Score"
},
{
"category": "other",
"text": "Is related to (a version of) an uncommon product, There is exploit data available from source Nvd, Is related to CWE-352 (Cross-Site Request Forgery (CSRF)), The value of the most recent EPSS score",
"title": "NCSC Score top decreasing factors"
}
],
"product_status": {
"known_affected": [
"CSAFPID-5893889"
]
},
"references": [
{
"category": "external",
"summary": "Source - nvd",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34394"
},
{
"category": "external",
"summary": "Source - cveprojectv5",
"url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/34xxx/CVE-2026-34394.json"
},
{
"category": "external",
"summary": "Source - github",
"url": "https://api.github.com/advisories/GHSA-4wwr-7h7c-chqr"
},
{
"category": "external",
"summary": "Source - first",
"url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
},
{
"category": "external",
"summary": "Reference - cveprojectv5; github; nvd",
"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-4wwr-7h7c-chqr"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34394"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://github.com/advisories/GHSA-4wwr-7h7c-chqr"
}
],
"scores": [
{
"cvss_v3": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"baseScore": 8.1,
"baseSeverity": "HIGH"
},
"products": [
"CSAFPID-5893889"
]
}
],
"title": "CVE-2026-34394"
}
]
}