Vulnerability · Published Sep 23, 2026 · Assigned by Fluid Attacks
CVE-2026-93769HumHub 1.18.5 - Stored XSS in Profile Field Category title via HForm#renderForm leading to System Administrator account takeover
High 7.2
In plain English
A high-severity cross-site scripting in Humhub from Humhub. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).
Severity (CVSS 4.0)7.2High
Exploit odds (30 days)0.5%top 57.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
References
- https://fluidattacks.com/advisories/cali third-party-advisory
- https://github.com/humhub/humhub product
- https://github.com/humhub/humhub/pull/8499 patch