{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35445","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-02T19:25:52.192Z","datePublished":"2026-08-26T16:40:51.500Z","dateUpdated":"2026-08-26T19:08:44.974Z"},"containers":{"cna":{"title":"Winter: Authenticated backend users can bypass Users controller permission checks","problemTypes":[{"descriptions":[{"cweId":"CWE-285","lang":"en","description":"CWE-285: Improper Authorization","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/wintercms/winter/security/advisories/GHSA-j5jq-cr68-v2xx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/wintercms/winter/security/advisories/GHSA-j5jq-cr68-v2xx"},{"name":"https://github.com/wintercms/winter/pull/1473","tags":["x_refsource_MISC"],"url":"https://github.com/wintercms/winter/pull/1473"},{"name":"https://github.com/wintercms/winter/releases/tag/v1.2.13","tags":["x_refsource_MISC"],"url":"https://github.com/wintercms/winter/releases/tag/v1.2.13"}],"affected":[{"vendor":"wintercms","product":"winter","versions":[{"version":"< 1.2.13","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-26T16:40:51.500Z"},"descriptions":[{"lang":"en","value":"Winter CMS is a content management system built on the Laravel PHP framework. In versions prior to 1.2.13, the backend did not validate the handler name submitted through the form postback _handler POST field, allowing an authenticated backend user to invoke arbitrary controller methods, including protected, private, and action-prefixed ones. While AJAX requests validate that handler names match the on[A-Z][\\w+]* pattern, the postback path passed the submitted _handler value straight to the handler dispatcher with no such check, so any controller that exposes a public action or conditionally relaxes its $requiredPermissions check could be reached, bypassing the roles and permissions system. The built-in Users controller was affected because it set $requiredPermissions to null for the myaccount action, letting any authenticated backend user invoke user-management methods such as update_onDelete and update_onManualPasswordReset without holding the backend.manage_users permission. This issue is fixed in version 1.2.13."}],"source":{"advisory":"GHSA-j5jq-cr68-v2xx","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-26T19:07:37.865693Z","id":"CVE-2026-35445","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-26T19:08:44.974Z"}}]}}