CVE-2026-93769
Deferred Deferred - Pending Action

Stored XSS in HumHub Profile Field Category

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: Fluid Attacks

Description
HumHub 1.18.5 is affected by a stored cross-site scripting (XSS) vulnerability that allows any user holding the delegated, non-system-administrator Manage Users permission (admin_manage_users) to inject persistent HTML/JavaScript into a Profile Field Category title.

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Meta Information

Published
2026-09-23
Last Modified
2026-09-23
Generated
2026-09-23
AI Q&A
2026-09-23
EPSS Evaluated
N/A
NVD
CVE-2026-93769
EUVD
EUVD-2026-85361

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
humhub humhub 1.18.5

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

HumHub 1.18.5 has a stored cross-site scripting (XSS) vulnerability. This allows users with the Manage Users permission (but not system administrator privileges) to inject persistent HTML or JavaScript into a Profile Field Category title. The injected code executes when other users view the affected page.

Detection Guidance

Check HumHub admin panel for unauthorized Profile Field Category titles containing HTML/JS code. Inspect network requests for unsanitized user input in form submissions. Review logs for unusual activity in user profile sections.

Impact Analysis

An attacker could steal session cookies, redirect users to malicious sites, or perform actions on behalf of users. This could lead to unauthorized access to sensitive data, account takeovers, or spreading malware within the platform.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR's integrity and confidentiality requirements. For HIPAA, it may compromise protected health information if user data is exposed. Both regulations require protection against unauthorized access and data breaches.

Mitigation Strategies

Update HumHub to the latest patched version. Remove non-system-administrator Manage Users permissions if not required. Implement input validation for Profile Field Category titles. Monitor for suspicious profile changes.

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