XSS in Humhub
CVE-2026-18526
HumHub Community Edition 1.18.4 and 1.18.4-pl1 contain a stored Cross-Site Scripting (XSS) vulnerability in the oEmbed confirmation rendering workflow.
Vulnerability class: XSS (Cross-Site Scripting)
Affected products
- Humhub — versions 1.18.4
Weakness classification (CWE)
References
- help@fluidattacks.com (third-party-advisory)
- help@fluidattacks.com (product)
- help@fluidattacks.com (patch)