{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-114622",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-21T20:34:25.600Z",
        "datePublished": "2026-10-23T13:41:33.272Z",
        "dateUpdated": "2026-10-23T13:41:33.272Z"
    },
    "containers": {
        "cna": {
            "title": "baserCMS: Encoded path traversal bypass in the theme file API",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "lang": "en",
                            "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-180",
                            "lang": "en",
                            "description": "CWE-180: Incorrect Behavior Order: Validate Before Canonicalize",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.2,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "HIGH",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/baserproject/basercms/security/advisories/GHSA-q7g3-qwrc-mp89",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-q7g3-qwrc-mp89"
                },
                {
                    "name": "https://github.com/baserproject/basercms/commit/53ecf177dfb10eb1fb89c4b42d313983329aa162",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/baserproject/basercms/commit/53ecf177dfb10eb1fb89c4b42d313983329aa162"
                },
                {
                    "name": "https://github.com/baserproject/basercms/releases/tag/5.3.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/baserproject/basercms/releases/tag/5.3.2"
                },
                {
                    "name": "https://github.com/baserproject/basercms/releases/tag/5.4.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/baserproject/basercms/releases/tag/5.4.2"
                }
            ],
            "affected": [
                {
                    "vendor": "baserproject",
                    "product": "basercms",
                    "versions": [
                        {
                            "version": ">= 5.2.3, < 5.3.2",
                            "status": "affected"
                        },
                        {
                            "version": ">= 5.4.0, < 5.4.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-23T13:41:33.272Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "source": {
                "advisory": "GHSA-q7g3-qwrc-mp89",
                "discovery": "UNKNOWN"
            }
        }
    }
}