{"id":"CVE-2026-105090","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-105090","generatedAt":"2026-10-28T01:02:27.056Z","title":"Formbricks before 5.4.4 and 6 before 6.0.1 allows stored XSS.","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.","published":"2026-10-03T02:17:18.000Z","lastModified":"2026-10-06T16:08:28.000Z","status":"Awaiting Analysis","sourceIdentifier":"cve@mitre.org","cvss":{"version":"4.0","score":5.1,"severity":"MEDIUM","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-863"],"affected":[],"epss":{"score":0.00334,"percentile":0.26565,"date":"2026-10-26","history":[{"date":"2026-10-03","score":0.00263,"percentile":0.16487}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.33%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-03T02:17:18.000Z","detail":{"score":"5.1","severity":"MEDIUM","publishedAt":"2026-10-03T02:17:18.370Z"},"summary":"New CVE, medium severity (CVSS 5.1)."}],"references":[{"url":"https://github.com/formbricks/formbricks/pull/9432","source":"cve@mitre.org"},{"url":"https://github.com/formbricks/formbricks/releases/tag/5.4.4","source":"cve@mitre.org"},{"url":"https://github.com/formbricks/formbricks/releases/tag/6.0.1","source":"cve@mitre.org"},{"url":"https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.html","source":"cve@mitre.org"},{"url":"https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.html","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-105090","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}