CVE-2026-89243
Received Received - Intake

Stored XSS in AVideo UserGroups via Unsanitized Group Name

Publication date: 2026-09-11

Last updated on: 2026-09-11

Assigner: VulnCheck

Description
WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in UserGroups::setGroup_name() that fails to sanitize group_name input. Administrators with canAdminUserGroups permission can inject malicious HTML and JavaScript that executes in the browser when other administrators access the user manager interface.

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Meta Information

Published
2026-09-11
Last Modified
2026-09-11
Generated
2026-09-11
AI Q&A
2026-09-11
EPSS Evaluated
N/A
NVD
CVE-2026-89243
EUVD
EUVD-2026-76055

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wwbn avideo *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

CVE-2026-89243 is a stored cross-site scripting (XSS) vulnerability in WWBN AVideo software. It occurs in the UserGroups::setGroup_name() function where user input for group_name is stored without proper sanitization. When other administrators access the user manager interface, the injected malicious scripts execute in their browsers.

Detection Guidance

Check AVideo admin interfaces for suspicious group names containing HTML/JS payloads like <img src=x onerror=alert(1)>. Review UserGroups::setGroup_name() function in the codebase for unsanitized input handling. Inspect network traffic for unauthorized admin actions triggered by injected scripts.

Impact Analysis

An attacker with admin privileges can inject malicious scripts that execute in other administrators' browsers. This could lead to unauthorized actions via same-origin requests, such as stealing session cookies, modifying settings, or performing actions on behalf of the admin.

Compliance Impact

This vulnerability could compromise data confidentiality and integrity, which are critical for GDPR and HIPAA compliance. Unauthorized script execution may lead to data breaches, violating these regulations and potentially resulting in legal penalties or loss of trust.

Mitigation Strategies

Apply the patch from GitHub Security Advisory GHSA-qm3h-2jrx-xmg6 immediately. Sanitize all user inputs in UserGroups::setGroup_name() using htmlspecialchars or similar functions. Restrict canAdminUserGroups permission to trusted administrators only.

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