AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS

• CVE-2026-33043: 0.35% estimated exploitation activity in the next 30 days; percentile 28.81 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary /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. Details File: objects/phpsessionid.json.php No authentication is required. The allowOrigin() function in objects/functions.php (line ~2648) reflects the request Origin: This means any external website can make a credentialed cross-origin request and read the session ID. PoC An attacker hosts the following page: When 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. Impact 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.

Published by the source

17 Mar 2026, 19:52 UTC

Last modified by the source

20 Mar 2026, 21:23 UTC

Source last checked

26 Oct 2026, 14:38 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-qc3p-398r-p59j

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# Patch Next advisory brief: CVE-2026-33043

Advisory: AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS
IDs: CVE-2026-33043, GHSA-qc3p-398r-p59j
Record: https://patchnext.com/advisories/cve-2026-33043 (revision 1, source checked 26 Oct 2026, 14:38 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist wwbn/avideo: affected <= 25.0

## Suggested inspection (read-only)
- Packagist wwbn/avideo: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on wwbn/avideo.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-qc3p-398r-p59j (GitHub-reviewed advisory GHSA-qc3p-398r-p59j lists affected ranges: Packagist wwbn/avideo >=0 <=25.0)

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