{"schema_version":1,"title":"Winter CMS Backend Module vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 5 vulnerabilities in Winter CMS Backend Module: 0 in the last 7 days and 5 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-54256, was published on 26 August 2026.","url":"https://junglewise.ai/threats/technologies/backend-module","json_url":"https://junglewise.ai/threats/technologies/backend-module.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/backend-module","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":3,"all_time":5,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":5,"last_365_days":5},"latest":[{"cve":"CVE-2026-54256","cvss":5.4,"epss":0.0024,"slug":"cve-2026-54256-winter-cms-fileupload-widget-idor-in-attachment-metadata","title":"Winter CMS is a content management system built on the Laravel PHP framework. In versions up to and including 1.2.12, the backend FileUpload","severity":"medium","exploited":false,"published_at":"2026-08-26T18:16:40.78+00:00","url":"https://junglewise.ai/threats/cve-2026-54256-winter-cms-fileupload-widget-idor-in-attachment-metadata"},{"cve":"CVE-2026-35445","cvss":4,"epss":0.0044,"slug":"cve-2026-35445-winter-cms-authorization-bypass-in-users-controller","title":"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","severity":"high","exploited":false,"published_at":"2026-08-26T17:16:56.397+00:00","url":"https://junglewise.ai/threats/cve-2026-35445-winter-cms-authorization-bypass-in-users-controller"},{"cve":"CVE-2026-32258","cvss":8.1,"epss":0.0038,"slug":"cve-2026-32258-winter-cms-stored-xss-in-editor-settings-custom-styles","title":"Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. From 1.2.10 through 1.2.12, authenticated","severity":"high","exploited":false,"published_at":"2026-08-26T17:16:53.41+00:00","url":"https://junglewise.ai/threats/cve-2026-32258-winter-cms-stored-xss-in-editor-settings-custom-styles"},{"cvss":8.3,"slug":"winter-cms-importexportcontroller-ajax-handlers-permission-bypass-ac8bbb08","title":"Winter CMS ImportExportController AJAX handlers permission bypass","severity":"high","exploited":false,"published_at":"2026-08-20T18:44:50+00:00","url":"https://junglewise.ai/threats/winter-cms-importexportcontroller-ajax-handlers-permission-bypass-ac8bbb08"},{"cvss":2,"slug":"winter-backend-list-widget-stored-xss-in-image-columns-e56efd1b","title":"Winter Backend List widget stored XSS in image columns","severity":"low","exploited":false,"published_at":"2026-08-20T18:44:41+00:00","url":"https://junglewise.ai/threats/winter-backend-list-widget-stored-xss-in-image-columns-e56efd1b"}],"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":2},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":3},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"Winter CMS","slug":"winter-cms","vulnerabilities":6,"url":"https://junglewise.ai/threats/technologies/winter-cms"},{"name":"Winter CMS WN Backend Module","slug":"wn-backend-module","vulnerabilities":5,"url":"https://junglewise.ai/threats/technologies/wn-backend-module"}],"technology":{"hub":true,"name":"Winter CMS Backend Module","slug":"backend-module","vendor":{"name":"Winter CMS","slug":"winter-cms","url":"https://junglewise.ai/threats/vendors/winter-cms"},"aliases":[],"url":"https://junglewise.ai/threats/technologies/backend-module"},"most_severe":[{"cvss":8.3,"slug":"winter-cms-importexportcontroller-ajax-handlers-permission-bypass-ac8bbb08","title":"Winter CMS ImportExportController AJAX handlers permission bypass","severity":"high","exploited":false,"published_at":"2026-08-20T18:44:50+00:00","url":"https://junglewise.ai/threats/winter-cms-importexportcontroller-ajax-handlers-permission-bypass-ac8bbb08"},{"cve":"CVE-2026-32258","cvss":8.1,"epss":0.0038,"slug":"cve-2026-32258-winter-cms-stored-xss-in-editor-settings-custom-styles","title":"Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. From 1.2.10 through 1.2.12, authenticated","severity":"high","exploited":false,"published_at":"2026-08-26T17:16:53.41+00:00","url":"https://junglewise.ai/threats/cve-2026-32258-winter-cms-stored-xss-in-editor-settings-custom-styles"},{"cve":"CVE-2026-35445","cvss":4,"epss":0.0044,"slug":"cve-2026-35445-winter-cms-authorization-bypass-in-users-controller","title":"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","severity":"high","exploited":false,"published_at":"2026-08-26T17:16:56.397+00:00","url":"https://junglewise.ai/threats/cve-2026-35445-winter-cms-authorization-bypass-in-users-controller"},{"cve":"CVE-2026-54256","cvss":5.4,"epss":0.0024,"slug":"cve-2026-54256-winter-cms-fileupload-widget-idor-in-attachment-metadata","title":"Winter CMS is a content management system built on the Laravel PHP framework. In versions up to and including 1.2.12, the backend FileUpload","severity":"medium","exploited":false,"published_at":"2026-08-26T18:16:40.78+00:00","url":"https://junglewise.ai/threats/cve-2026-54256-winter-cms-fileupload-widget-idor-in-attachment-metadata"},{"cvss":2,"slug":"winter-backend-list-widget-stored-xss-in-image-columns-e56efd1b","title":"Winter Backend List widget stored XSS in image columns","severity":"low","exploited":false,"published_at":"2026-08-20T18:44:41+00:00","url":"https://junglewise.ai/threats/winter-backend-list-widget-stored-xss-in-image-columns-e56efd1b"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}