---
id: CVE-2026-88871
title: >-
  WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 (master,
  2026-08-23) contains a cross-site request forgery vulnerability in the
  CustomizeUser plugin's plugin/CustomizeUser/setSubscribers.json.php endpoint
summary: >-
  WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 (master,
  2026-08-23) contains a cross-site request forgery vulnerability in the
  CustomizeUser plugin's plugin/CustomizeUser/setSubscribers.json.php endpoint.
  The script …
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-352
vendor: WWBN
product: AVideo
affected:
  - AVideo <= c3edcc274c389816d434acadac07ee78eaf330c1
published: '2026-09-10'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T15:17:25.543'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88871'
references:
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-p9c3-prq7-g8xc'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wwbn-avideo-customizeuser-setsubscribers-csrf-via-get
    label: disclosure@vulncheck.com
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-p9c3-prq7-g8xc'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T14:20:22.744775Z'
epss: 0.00181
epssPercentile: 0.06815
ingestedAt: '2026-09-14T08:43:58.610Z'
---

## Overview

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 (master, 2026-08-23) contains a cross-site request forgery vulnerability in the CustomizeUser plugin's plugin/CustomizeUser/setSubscribers.json.php endpoint. The script reads users_id and ExtraSubscribers from $_REQUEST and calls User::setExtraSubscribers() without requiring a POST request or a valid CSRF token; autoCSRFGuard() is applied only to POST requests to *.json.php, and the mutation does not pass through ObjectYPT::save()/isUntrustedRequest(), so a cross-origin GET succeeds. An unauthenticated remote attacker who induces a logged-in administrator to load a crafted page (for example an <img> tag pointing at the endpoint) can forge the ExtraSubscribers count displayed on any user's channel. The CustomizeUser plugin is enabled by default, and no patched version was available at the time of reporting.

## Remediation

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