CVE-2026-89249 AVideo YPTWallet Stored XSS via CryptoWallet Configuration
Attackers can inject malicious scripts via CryptoWallet values, leading to administrative session hijacking and privilege escalation in AVideo.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-89249?
CVE-2026-89249 is a critical cross-site scripting vulnerability in WWBN AVideo, published on 11 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in the YPTWallet plugin where user-supplied CryptoWallet values are base64-encoded but not HTML-escaped before storage in wallet_log.information. Administrators viewing pending withdrawal requests in pendingRequests.php execute the stored markup in their session, allowing attackers to perform administrative actions via same-origin fetch requests.
Weakness: CWE-79
Which versions are affected by CVE-2026-89249?
How do I fix CVE-2026-89249?
No fix has been published for CVE-2026-89249 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-89249 being exploited?
There is no known exploitation of CVE-2026-89249 in the wild and no public exploit code.
Sources
Also known as GHSA-f6wj-pwqq-gc5w, GHSA-fvp5-q9jp-29mx.