CVE-2026-45580: WWBN AVideo Live: stored XSS via unescaped stream key in modeYoutubeLive.php class attribute

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-29 · updated 2026-07-21
Weakness: CWE-79

Description

WWBN AVideo is an open source video platform. In 29.0 and earlier, there is a stored cross-site scripting vulnerability. The Live plugin's "YouTube-style" view renders the live transmission's stream key into an HTML class attribute by raw echo, without htmlspecialchars(). A canStream user can persist a key containing " plus an event handler via plugin/Live/saveLive.php, and any visitor (logged in or anonymous) opening the stream's live page executes attacker JavaScript in the platform origin.

Affected products

WWBN AVideo: through 29.0

References

https://github.com/WWBN/AVideo/security/advisories/GHSA-m5j4-7r85-2cj2

Get alerted when CVE-2026-45580 or the next vulnerability affects your stack