CVE-2026-125338

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-125338", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-11-09T21:22:55.599Z", "datePublished": "2026-11-10T20:03:19.875Z", "dateUpdated": "2026-11-10T20:03:19.875Z"}, "containers": {"cna": {"title": "Winter CMS: Stored XSS through cached Brand Settings and Editor Settings custom styles", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/wintercms/winter/security/advisories/GHSA-5cwr-5jxg-pcf6", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/wintercms/winter/security/advisories/GHSA-5cwr-5jxg-pcf6"}, {"name": "https://github.com/wintercms/winter/commit/c95d780ab54f3a3f74a94ae1667bf12b3c549d5d", "tags": ["x_refsource_MISC"], "url": "https://github.com/wintercms/winter/commit/c95d780ab54f3a3f74a94ae1667bf12b3c549d5d"}, {"name": "https://github.com/wintercms/winter/releases/tag/v1.2.14", "tags": ["x_refsource_MISC"], "url": "https://github.com/wintercms/winter/releases/tag/v1.2.14"}], "affected": [{"vendor": "wintercms", "product": "winter", "versions": [{"version": "< 1.2.14", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-10T20:03:19.875Z"}, "descriptions": [{"lang": "en", "value": "Winter CMS is a content management system built on the Laravel PHP framework. Prior to 1.2.14, BrandSetting::renderCss() and EditorSetting::renderCss() store raw LESS compiler output with Cache::forever() but apply strip_tags() only to the value returned on a cache miss. The first render after saving custom CSS appears sanitized while priming an unsafe cache entry, and later cache hits return unsanitized output into the backend style element, allowing a user with backend.manage_branding or backend.manage_editor to cause stored cross-site scripting when another backend page renders the styles. The styles also appear on unauthenticated backend sign-in, password restore, and password reset layouts. This issue is fixed in version 1.2.14."}], "source": {"advisory": "GHSA-5cwr-5jxg-pcf6", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "winter", "vendor": "wintercms", "versions": [{"status": "affected", "version": "< 1.2.14"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Winter CMS is a content management system built on the Laravel PHP framework. Prior to 1.2.14, BrandSetting::renderCss() and EditorSetting::renderCss() store raw LESS compiler output with Cache::forever() but apply strip_tags() only to the value returned on a cache miss. The first render after saving custom CSS appears sanitized while priming an unsafe cache entry, and later cache hits return unsanitized output into the backend style element, allowing a user with backend.manage_branding or backend.manage_editor to cause stored cross-site scripting when another backend page renders the styles. The styles also appear on unauthenticated backend sign-in, password restore, and password reset layouts. This issue is fixed in version 1.2.14."}], "id": "CVE-2026-125338", "lastModified": "2026-11-12T22:18:51.470", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-10T20:19:08.263", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/wintercms/winter/commit/c95d780ab54f3a3f74a94ae1667bf12b3c549d5d"}, {"source": "security-advisories@github.com", "url": "https://github.com/wintercms/winter/releases/tag/v1.2.14"}, {"source": "security-advisories@github.com", "url": "https://github.com/wintercms/winter/security/advisories/GHSA-5cwr-5jxg-pcf6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.2.14)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "winter", "source": "cna", "vendor": "wintercms"}, "product": "winter", "vendor": "wintercms"}], "created": "2026-11-12T01:30:05.188170+00:00", "updated": "2026-11-12T22:00:09.546907+00:00", "vendors": ["wintercms", "wintercms$PRODUCT$winter"]}