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.
Metrics
Affected Vendors & Products
References
History
Mon, 05 Oct 2026 17:30:00 +0000
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ssvc
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Sat, 03 Oct 2026 05:15:00 +0000
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Formbricks
Formbricks formbricks |
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Formbricks
Formbricks formbricks |
Sat, 03 Oct 2026 04:15:00 +0000
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| Title | Stored XSS via Custom Head Scripts in Formbricks |
Sat, 03 Oct 2026 02:15:00 +0000
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| 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. | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: mitre
Published: 2026-10-03T01:59:10.911Z
Updated: 2026-10-05T17:05:12.057Z
Reserved: 2026-10-03T01:59:10.142Z
Link: CVE-2026-105090
Updated: 2026-10-05T17:04:34.279Z
Status : Awaiting Analysis
Published: 2026-10-03T02:17:18.370
Modified: 2026-10-06T16:08:27.613
Link: CVE-2026-105090
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