CVE-2026-114624

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{"affected": [{"affectedData": [{"product": "basercms", "vendor": "baserproject", "versions": [{"status": "affected", "version": ">= 5.0.0, < 5.3.2"}, {"status": "affected", "version": ">= 5.4.0, < 5.4.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "baserCMS is a website development framework. In versions 5.0.0 before 5.3.2 and 5.4.0 before 5.4.2, the widget-area entity serializes widgets only when the submitted value is an array, allowing a string submitted through the admin JSON API to be stored unchanged. Entity reads, including front-end rendering and API responses, deserialize the stored value with unserialize() without an allowed_classes restriction, accepting both raw and base64-encoded serialized data. An administrator, or an attacker who obtains widget-write capability through a separate vulnerability such as chained XSS, can plant an object graph that subsequently triggers on unauthenticated page requests. Two demonstrated gadget chains in the default dependency set use composer/composer ProcessExecutor::startJob() with Process::fromShellCommandline(), or logiscape/mcp-sdk-php StdioTransport::connect() with StdioServerParameters, to reach proc_open() and execute commands as the web-server user. Deserialization bypasses constructor-based readonly safeguards, and the stored payload can execute repeatedly until the database row is repaired. Unauthenticated page access is a trigger after privileged payload storage, not an unauthenticated means of initially planting the payload. This issue has been patched in versions 5.3.2 and 5.4.2."}], "id": "CVE-2026-114624", "lastModified": "2026-10-29T14:17:48.067", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-114624", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-29T13:36:12.812582Z", "version": "2.0.3"}}]}, "published": "2026-10-23T14:17:51.583", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/baserproject/basercms/commit/38c778e92688e7f5d620a4c6b47ad7fb9e2c1529"}, {"source": "security-advisories@github.com", "url": "https://github.com/baserproject/basercms/commit/59dfe61e193ae3274c195c15e7b185816d2db9db"}, {"source": "security-advisories@github.com", "url": "https://github.com/baserproject/basercms/releases/tag/5.3.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/baserproject/basercms/releases/tag/5.4.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-xf6p-r2hc-cc6w"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-xf6p-r2hc-cc6w"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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