CVE-2026-89240 WWBN AVideo Reflected XSS via confirmLivePassword.php
Remote attackers can execute arbitrary JavaScript in victim browsers via a crafted link, potentially leading to account takeover.
- 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-2026-89240?
CVE-2026-89240 is a medium-severity cross-site scripting vulnerability in WWBN AVideo, published on 11 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
WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a reflected cross-site scripting vulnerability in plugin/Live/confirmLivePassword.php. The script interpolates the unauthenticated GET parameter u (which is not covered by $securityFilter) directly into an <img src="..."> attribute without URL- or HTML-encoding. A remote attacker can craft a link containing a double-quote character in u (with a non-empty key parameter and no valid c parameter) to close the src attribute and inject an additional tag with an onerror handler, executing arbitrary JavaScript in the site's origin in the browser of any user, including an administrator, who opens the link. No patched version was available at the time of the advisory.
Weakness: CWE-79
Which versions are affected by CVE-2026-89240?
How do I fix CVE-2026-89240?
No fix has been published for CVE-2026-89240 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-2026-89240 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89240 exists.
Sources
Also known as GHSA-87qx-9wgx-954f, GHSA-f9ww-jjg2-8xj5.