XSS in Wwbn Avideo
CVE-2026-88869
AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in the AD_Server plugin's log.php endpoint that fails to escape the label parameter before storage. An unauthenticated attacker can inject malicious HTML through the label parameter, which is later rendered unsanitized in the admin Ad Types report using jQuery .html(), allowing execution of arbitrary JavaScript in an administrator's browser session.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (44.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-h68w-3r38-wmm8 (vendor-advisory)
- www.vulncheck.com/advisories/avideo-ad-server-stored-xss-via-log-php-label-para… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-88869?
- CVE-2026-88869 is a critical-severity vulnerability in Wwbn Avideo, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2026-09-10.
- How severe is CVE-2026-88869?
- Critical severity. CVSS v3 base score is 9.3 out of 10.