{"id":"CVE-2026-114624","title":"baserCMS: PHP object injection via unguarded unserialize() in the widget-area entity","summary":"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 A…","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-502"],"vendor":"baserproject","product":"basercms","affected":["basercms >= 5.0.0, < 5.3.2","basercms >= 5.4.0, < 5.4.2"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T13:47:08.832Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114624","references":[{"url":"https://github.com/baserproject/basercms/security/advisories/GHSA-xf6p-r2hc-cc6w","label":"https://github.com/baserproject/basercms/security/advisories/GHSA-xf6p-r2hc-cc6w"},{"url":"https://github.com/baserproject/basercms/commit/38c778e92688e7f5d620a4c6b47ad7fb9e2c1529","label":"https://github.com/baserproject/basercms/commit/38c778e92688e7f5d620a4c6b47ad7fb9e2c1529"},{"url":"https://github.com/baserproject/basercms/commit/59dfe61e193ae3274c195c15e7b185816d2db9db","label":"https://github.com/baserproject/basercms/commit/59dfe61e193ae3274c195c15e7b185816d2db9db"},{"url":"https://github.com/baserproject/basercms/releases/tag/5.3.2","label":"https://github.com/baserproject/basercms/releases/tag/5.3.2"},{"url":"https://github.com/baserproject/basercms/releases/tag/5.4.2","label":"https://github.com/baserproject/basercms/releases/tag/5.4.2"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T14:28:08.700Z","slug":"CVE-2026-114624","body":"## Overview\n\nbaserCMS 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.\n\n## Affected\n\n- `basercms >= 5.0.0, < 5.3.2`\n- `basercms >= 5.4.0, < 5.4.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}