---
id: CVE-2026-86188
title: >-
  AVideo with YPTSocket plugin enabled contains a cross-site scripting
  vulnerability allowing unauthenticated attackers to execute arbitrary
  JavaScript in other users' browsers via the websocket callback mechanism
summary: >-
  AVideo with YPTSocket plugin enabled contains a cross-site scripting
  vulnerability allowing unauthenticated attackers to execute arbitrary
  JavaScript in other users' browsers via the websocket callback mechanism.
  Attackers can send craft…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: WWBN
product: AVideo
affected:
  - AVideo <= 29.0
published: '2026-09-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:05:53.177'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86188'
references:
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-xpx7-h2x7-59qq'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/avideo-yptsocket-plugin-unauthenticated-cross-site-scripting
    label: disclosure@vulncheck.com
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-xpx7-h2x7-59qq'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00429
epssPercentile: 0.34502
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-08T13:15:20.362344Z'
ingestedAt: '2026-09-06T07:51:57.238Z'
---

## Overview

AVideo with YPTSocket plugin enabled contains a cross-site scripting vulnerability allowing unauthenticated attackers to execute arbitrary JavaScript in other users' browsers via the websocket callback mechanism. Attackers can send crafted socket messages with callback names resolving to global functions like avideoConfirmHTML that accept untrusted data and assign it to innerHTML, achieving script execution in the victim's origin without authentication or user interaction.

## Remediation

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