CVE-2026-89255 AVideo LoginControl Stored XSS via PGP Public Key
An authenticated attacker can inject malicious JavaScript via PGP public keys, leading to code execution in an administrator's session.
- 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-2026-89255?
CVE-2026-89255 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 LoginControl plugin that fails to HTML-encode PGP public keys echoed into a textarea element. An authenticated attacker can inject malicious JavaScript by submitting a crafted public key, which executes in an administrator's session when viewing the user's profile tab.
Weakness: CWE-79
Which versions are affected by CVE-2026-89255?
How do I fix CVE-2026-89255?
No fix has been published for CVE-2026-89255 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-2026-89255 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89255 exists.
Sources
Also known as GHSA-cm9h-j76v-35pq, GHSA-gq4h-vw2w-9rx3.