CVE-2026-88869 AVideo AD_Server Stored XSS via log.php label parameter
Unauthenticated attackers can inject malicious scripts via the label parameter in the AD_Server plugin, leading to arbitrary JavaScript execution in admin sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-88869?
CVE-2026-88869 is a critical cross-site scripting vulnerability in WWBN AVideo, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, 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 AD_Server plugin's log.php endpoint that fails to escape the label parameter before storage. An unauthenticated attacker can inject malicious HTML through the label parameter, which is later rendered unsanitized in the admin Ad Types report using jQuery .html(), allowing execution of arbitrary JavaScript in an administrator's browser session.
Weakness: CWE-79
Which versions are affected by CVE-2026-88869?
How do I fix CVE-2026-88869?
No fix has been published for CVE-2026-88869 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-2026-88869 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88869 exists.
Sources
Also known as GHSA-8227-p896-cv66, GHSA-h68w-3r38-wmm8.