Vulnerability 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.
Related Weaknesses (CWE)
References
- https://fluidattacks.com/es/advisories/turizo
- https://github.com/humhub/humhub
- https://github.com/humhub/humhub/pull/8381
FAQ
What is CVE-2026-18756?
CVE-2026-18756 is a documented vulnerability. 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 ...
How severe is CVE-2026-18756?
CVSS scoring is not yet available for CVE-2026-18756. Check NVD for updates.
Is there a patch for CVE-2026-18756?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.