{"id":"CVE-2026-105090","state":"PUBLISHED","title":"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 me","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.","publishedAt":"2026-10-03T01:59:10.911Z","updatedAt":"2026-10-05T17:05:12.057Z","severity":{"score":5.1,"label":"Medium","version":"4.0","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","source":"mitre"},"assigner":"mitre","products":["Formbricks Formbricks"],"affected":[{"vendor":"Formbricks","product":"Formbricks","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.4.4","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThan":"6.0.1","versionType":"semver"}],"collectionURL":"https://github.com/formbricks/formbricks"}],"references":["https://github.com/formbricks/formbricks/releases/tag/6.0.1","https://github.com/formbricks/formbricks/releases/tag/5.4.4","https://github.com/formbricks/formbricks/pull/9432","https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.html"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/105xxx/CVE-2026-105090.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105090","state":"PUBLISHED","datePublished":"2026-10-03T01:59:10.911Z","dateUpdated":"2026-10-05T17:05:12.057Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-10-03T01:59:10.142Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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":[{"vendor":"Formbricks","product":"Formbricks","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.4.4","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThan":"6.0.1","versionType":"semver"}],"collectionURL":"https://github.com/formbricks/formbricks"}],"references":[{"url":"https://github.com/formbricks/formbricks/releases/tag/6.0.1","name":"Formbricks release 6.0.1 (fix)","tags":["release-notes","patch"]},{"url":"https://github.com/formbricks/formbricks/releases/tag/5.4.4","name":"Formbricks release 5.4.4 (fix, backport)","tags":["release-notes","patch"]},{"url":"https://github.com/formbricks/formbricks/pull/9432","name":"PR #9432 - require Manage access to change survey custom head scripts","tags":["patch"]},{"url":"https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.html","tags":["technical-description"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","description":"CWE-863 Incorrect Authorization","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-10-03T01:59:10.911Z"},"x_generator":{"engine":"CVE-Request-form 0.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.html","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-05T17:04:02.074755Z","id":"CVE-2026-105090","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-05T17:05:12.057Z"}}]}}}