Vulnerability · Published May 11, 2026 · Assigned by GitHub_M

CVE-2026-43878WWBN AVideo: Reflected XSS in plugin/Meet/iframe.php via Unescaped `user`/`pass` Parameters Reflected into JavaScript String Literal

Medium 6.1

In plain English

A medium-severity cross-site scripting in AVideo from WWBN. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 83.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

WWBN AVideo is an open source video platform. In versions up to and including 29.0, plugin/Meet/iframe.php echoes the attacker-controlled user and pass query parameters unescaped into a JavaScript double-quoted string literal inside a <script> block. An attacker who sends a victim to a crafted URL can break out of the string and execute arbitrary JavaScript in the victim's browser in the context of the AVideo origin. No authentication is required if a public Meet schedule exists on the target. Commit 3298ced2bcf92e4f3acff6ce9bde14edf42ecb5b contains an updated fix.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	wwbn/avideo	no fix listed	GHSA-mm5f-8q57-4fc4

Affected products (as reported)

Vendor	Product	Versions
WWBN	AVideo	<= 29.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/WWBN/AVideo/security/advisories/GHSA-mm5f-8q57-4fc4 x_refsource_CONFIRM
https://github.com/WWBN/AVideo/commit/3298ced2bcf92e4f3acff6ce9bde14edf42ecb5b x_refsource_MISC