CVE-2026-105090
- State
- Published
- Severity
- 5.1 Medium
- Published
- Oct 3, 2026
- Updated
- Oct 5, 2026
- Reserved
- Oct 3, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N | mitre |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
FormbricksFormbricks |
|
References
- Formbricks release 6.0.1 (fix)release-notespatch
- Formbricks release 5.4.4 (fix, backport)release-notespatch
- PR #9432 - require Manage access to change survey custom head scriptspatch
- https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.htmltechnical-description
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