WWBN AVideo: Stored XSS via unescaped Gallery category description

published 2026-05-29 5 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-33304 , GHSA-c8h8-vq34-9fw2

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits: 0; none known

WWBN AVideo is an open source video platform. In 29.0 and earlier, AVideo stores category descriptions from user input and later renders category_description as raw HTML in the Gallery view. A user who can create or edit categories can store JavaScript in a category description, which executes when another user views the affected Gallery/category page. This is a stored XSS in the category description field, separate from previously fixed XSS issues in video titles or comments.

Patch / fix

links 1

github.com/WWBN/AVideo@6a6ff1f commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-05-30)

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/WWBN/AVideo/security/advisories/GHSA-c8h8-vq34-9fw2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
GitHub	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	WWBN/AVideo	<=29.0	no fix listed

Affected products

WWBN AVideo

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /WWBN/AVideo/commit/6a6ff1f5bff1904f91f612db9f0da083295392b1
web
github.com /WWBN/AVideo/security/advisories/GHSA-c8h8-vq34-9fw2
exploit, web, mitigation, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-47694
advisory
github.com /WWBN/AVideo
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary