XSS in Humhub
CVE-2026-29048
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (9.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Humhub — versions 1.18.0, = 1.18.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-29048?
- CVE-2026-29048 is a medium-severity vulnerability in Humhub, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-06.
- How severe is CVE-2026-29048?
- Medium severity. CVSS v3 base score is 6.1 out of 10.