VULNERABILITY INTELLIGENCE
CVE-2026-18756
EPSS probability0.47%
CISA KEVNot currently listed
Published2026-08-19
Last modified2026-10-27
Description
HumHub Community Edition 1.18.4 contains a reflected cross-site scripting vulnerability in the Space membership-request workflow. An attacker can place attacker-controlled button configuration in the options query-string parameter of space/membership/request-membership-form, lure an authenticated non-member into submitting the legitimate membership request form, and cause the server to return JavaScript containing attacker-controlled code.
Weakness classification
- help@fluidattacks.com: CWE-79