{"schema":"threatline.record/2","record":{"id":"CVE-2026-114622","aliases":["GHSA-q7g3-qwrc-mp89"],"summary":"baserCMS: Encoded path traversal bypass in the theme file API","details":"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.","categories":["Unclassified"],"product":"basercms","vendor":"baserproject","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114622","source_modified_at":"2026-10-23T13:41:33.272Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"basercms","vendor":"baserproject","versions":[{"status":"affected","version":">= 5.2.3, < 5.3.2"},{"status":"affected","version":">= 5.4.0, < 5.4.2"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/baserproject/basercms/security/advisories/GHSA-q7g3-qwrc-mp89","source_modified_at":"2026-10-22T22:48:27Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"ecosystem":"other","name":"baserCMS"},"range":">= 5.2.3, <= 5.4.1"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/baserproject/basercms/security/advisories/GHSA-q7g3-qwrc-mp89","source_modified_at":"2026-10-22T22:48:27Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"ecosystem":"other","name":"baserCMS"},"version":"5.3.2"},{"source":"GitHub Advisory Database","source_url":"https://github.com/baserproject/basercms/security/advisories/GHSA-q7g3-qwrc-mp89","source_modified_at":"2026-10-22T22:48:27Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"ecosystem":"other","name":"baserCMS"},"version":"5.4.2"}],"cvss":7.2,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00663,"percentile":0.51168,"score_date":"2026-10-24"},"published_at":"2026-10-23T13:41:33.272Z","modified_at":"2026-10-23T13:41:33.272Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-114622","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T13:41:33.272Z"},{"source":"GitHub Advisory Database","url":"https://github.com/baserproject/basercms/security/advisories/GHSA-q7g3-qwrc-mp89","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-22T22:48:27Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114622","fetched_at":"2026-10-24T18:03:20.872036Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/baserproject/basercms/security/advisories/GHSA-q7g3-qwrc-mp89","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/baserproject/basercms/commit/53ecf177dfb10eb1fb89c4b42d313983329aa162","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/baserproject/basercms/releases/tag/5.3.2","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/baserproject/basercms/releases/tag/5.4.2","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T13:41:33.272Z","content_hash":"81bd3f193e713ab6cc6a0967536de20cbabe45065bb554b2dddbfc6880a59944"}}