---
title: "CVE-2026-88866: WWBN AVideo - Stored XSS"
description: "WWBN AVideo contains a stored XSS caused by failure to encode the User-Agent header in the LoginControl plugin, letting attackers with valid accounts execute scripts in administrator browsers via Login History page."
url: https://panop.io/threat-heartbeat/CVE-2026-88866/
---

# CVE-2026-88866 WWBN AVideo - Stored XSS

WWBN AVideo contains a stored XSS caused by failure to encode the User-Agent header in the LoginControl plugin, letting attackers with valid accounts execute scripts in administrator browsers via Login History page.

CVSS base score 8.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.45% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-88866)

## Details

Type

Stored XSS

Impact

Stored XSS

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Published

10 September 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to the latest version containing commit c3edcc274c389816d434acadac07ee78eaf330c1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-88866](https://nvd.nist.gov/vuln/detail/CVE-2026-88866)
- [https://www.vulncheck.com/advisories/wwbn-avideo-logincontrol-stored-xss-via-user-agent-header](https://www.vulncheck.com/advisories/wwbn-avideo-logincontrol-stored-xss-via-user-agent-header)
- [https://github.com/WWBN/AVideo/security/advisories/GHSA-wg67-62q3-2m33](https://github.com/WWBN/AVideo/security/advisories/GHSA-wg67-62q3-2m33)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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