CVE-2026-105090
Severity not reportedFormbricks before 5.4.4 and 6 before 6.0.1 allows stored XSS.
Formbricks before 5.4.4 and 6 before 6.0.1 allows stored XSS. The survey-level Custom Head Scripts feature did not enforce the documented Manage permission boundary. A workspace member holding only readWrite permission could configure Custom Head Scripts on a survey, an operation the documentation restricts to the Manage role. Because the configured scripts execute in the authenticated browser session of any user who opens the affected survey, a lower-privileged member can run arbitrary JavaScript (stored cross-site scripting) in the session of higher-privileged users. Fixed versions require Manage access to modify survey Custom Head Scripts.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/formbricks/formbricks/pull/9432 cve@mitre.org
- https://github.com/formbricks/formbricks/releases/tag/5.4.4 cve@mitre.org
- https://github.com/formbricks/formbricks/releases/tag/6.0.1 cve@mitre.org
- https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom... cve@mitre.org
- https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom... 134c704f-9b21-4f2e-91b3-4a467353bcc0