{"id":"CVE-2026-114622","revision":"69e77d60089c453ca4549732d83be8b6","records":[{"revision":"69e77d60089c453ca4549732d83be8b6","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-114622","aliases":[],"title":"baserCMS: Encoded path traversal bypass in the theme file API","description":"baserCMS is a website development framework. In versions 5.2.3 before 5.3.2 and 5.4.0 before 5.4.2, the optional BcThemeFile plugin's Admin API validates a raw path in ThemeFilesService::update() and getFullpath(), but ThemeFileForm::_execute() subsequently applies rawurldecode() to fullpath before writing. Because normalizePath() resolves only literal dot segments, percent-encoded traversal can pass the containment checks and become a path outside the theme directory at the write sink. An authenticated administrator can write PHP files into writable locations such as webroot and execute them, exceeding the intended theme-template editing boundary. The source also identifies the same check-before-decode ordering in ThemeFilesService::copy(), although that path was not dynamically verified. Exploitation requires the non-default plugin, an administrator session, and a same-origin Origin header; USE_CORE_ADMIN_API=false does not block session-authenticated requests. The Admin web form is not affected by this encoded-path tampering because FormProtection protects fullpath. This is a third bypass of the protections associated with CVE-2026-30940, using encoded traversal decoded after validation. This issue has been patched in versions 5.3.2 and 5.4.2.","state":0,"publishedAt":"2026-10-23T13:41:33.272+00:00","modifiedAt":"2026-10-23T13:41:33.272+00:00","affected":[{"ecosystem":"Vendor product","name":"basercms","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"baserproject\",\n                    \"product\": \"basercms\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 5.2.3, < 5.3.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 5.4.0, < 5.4.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2,"severity":"HIGH"}],"references":["https://github.com/baserproject/basercms/security/advisories/GHSA-q7g3-qwrc-mp89","https://github.com/baserproject/basercms/commit/53ecf177dfb10eb1fb89c4b42d313983329aa162","https://github.com/baserproject/basercms/releases/tag/5.3.2","https://github.com/baserproject/basercms/releases/tag/5.4.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114622","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-114622","identifiers":["CVE-2026-114622"]},"retained":false,"historicalAffected":[]}],"coverage":[]}