---
id: CVE-2026-89256
title: >-
  AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a
  stored cross-site scripting vulnerability in the Bookmark plugin where chapter
  names are not encoded before being concatenated into public watch-page HTML
summary: >-
  AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a
  stored cross-site scripting vulnerability in the Bookmark plugin where chapter
  names are not encoded before being concatenated into public watch-page HTML. A
  video…
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'
cwe:
  - CWE-79
vendor: WWBN
product: AVideo
affected:
  - AVideo <= c3edcc274c389816d434acadac07ee78eaf330c1
published: '2026-09-11'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T20:19:23.217'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89256'
references:
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-jggq-mm5m-r5wv'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/avideo-bookmark-plugin-stored-xss-via-chapter-names
    label: disclosure@vulncheck.com
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-jggq-mm5m-r5wv'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-11T19:16:36.530278Z'
ingestedAt: '2026-09-13T23:56:52.558Z'
epss: 0.00323
epssPercentile: 0.25493
---

## Overview

AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in the Bookmark plugin where chapter names are not encoded before being concatenated into public watch-page HTML. A video owner can inject malicious scripts via the bookmark name parameter, and every visitor of that video executes the payload in the AVideo origin.

## Remediation

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