XSS in Wwbn Avideo
CVE-2026-33683
WWBN AVideo is an open source video platform. In versions up to and including 26.0, a sanitization order-of-operations flaw in the user profile "about" field allows any registered user to inject arbitrary JavaScript that executes when other users visit their channel page. The `xss_esc()` function entity-encodes input before `strip_specific_tags()` can match dangerous HTML tags, and `html_entity_decode()` on output reverses the encoding, restoring the raw malicious HTML. Commit 7cfdc380dae1e56bbb5de581470d9e9957445df0 contains a patch.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001
Affected products
- Wwbn Avideo — versions <= 26.0
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-ghx5-7jjg-q2j7 (Exploit, Vendor Advisory)
- github.com/WWBN/AVideo/commit/7cfdc380dae1e56bbb5de581470d9e9957445df0 (Patch)
Frequently asked questions
- What is CVE-2026-33683?
- CVE-2026-33683 is a medium-severity vulnerability in Wwbn Avideo, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-23.
- How severe is CVE-2026-33683?
- Medium severity. CVSS v3 base score is 5.4 out of 10.