---
id: CVE-2026-116139
title: WWBN AVideo 26.0 through 29.3.0 Stored XSS via Comment Markdown Rendering
summary: >-
  WWBN AVideo 26.0 through 29.3.0 contains a stored cross-site scripting
  vulnerability that allows authenticated commenters to inject JavaScript
  because markDownToHTML() preserves event-handler attributes in leading HTML
  blocks. Attackers …
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: WWBN
product: AVideo
affected:
  - AVideo >= 26.0 <= 29.3.0
published: '2026-10-25'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T13:19:51.674Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116139'
references:
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-cx46-26xc-2w7f'
    label: GitHub Security Advisory (GHSA-cx46-26xc-2w7f)
  - url: >-
      https://github.com/WWBN/AVideo/commit/f13587c59346b4bf0f449273021d29b869594559
    label: Patch Commit
  - url: >-
      https://www.vulncheck.com/advisories/wwbn-avideo-26.0-through-29.3.0-stored-xss-via-comment-markdown-rendering
    label: >-
      VulnCheck Advisory: WWBN AVideo 26.0 through 29.3.0 Stored XSS via Comment
      Markdown Rendering
tags:
  - cve.org
ingestedAt: '2026-10-25T22:08:29.956Z'
---

## Overview

WWBN AVideo 26.0 through 29.3.0 contains a stored cross-site scripting vulnerability that allows authenticated commenters to inject JavaScript because markDownToHTML() preserves event-handler attributes in leading HTML blocks. Attackers can post a comment starting with an img tag carrying an onerror handler, which bypasses the inline sanitizer and executes in viewers' browsers under the application origin.

## Affected

- `AVideo >= 26.0 <= 29.3.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.