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6.9

HumHub 1.18.0: Malicious scripts can run on users' browsers

CVE-2026-29048
Summary

A security flaw in HumHub's Button component in version 1.18.0 allows attackers to inject malicious code into users' browsers. This could lead to unauthorized actions or data theft. Update to version 1.18.1 to fix the issue.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software
VendorProductAffected versionsFix available
humhub humhub 1.18.0 –
Original title
HumHub is an Open Source Enterprise Social Network. In version 1.18.0, a cross-site scripting vulnerability was identified in the Button component of version 1.18.0. Due to inconsistent output enco...
Original description
HumHub is an Open Source Enterprise Social Network. In version 1.18.0, a cross-site scripting vulnerability was identified in the Button component of version 1.18.0. Due to inconsistent output encoding at several points within the software, malicious scripts could be injected and executed in the context of the user's browser. This issue has been patched in version 1.18.1.
nvd CVSS4.0 6.9
Vulnerability type
CWE-79 Cross-site Scripting (XSS)
Published: 6 Mar 2026 · Updated: 12 Mar 2026 · First seen: 6 Mar 2026