{"action":"Upgrade baserproject/basercms to 5.2.3 or later.","affected":[{"fixed":"5.2.3","introduced":"0"}],"component":"baserproject/basercms","cve_ids":["CVE-2026-21861"],"ecosystem":"Packagist","epss":0.02322,"exploited":false,"fixed_versions":["5.2.3"],"ghsa_id":"GHSA-qxmc-6f24-g86g","id":"tcs_01M5KF7QME7XZVQYJ8KPNE0S2K","modified_at":"2026-09-10T03:50:40.575249602Z","published_at":"2026-03-31T22:27:05Z","references":["https://osv.dev/vulnerability/GHSA-qxmc-6f24-g86g","https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86g","https://nvd.nist.gov/vuln/detail/CVE-2026-21861","https://basercms.net/security/JVN_20837860","https://github.com/baserproject/basercms","https://github.com/baserproject/basercms/releases/tag/5.2.3"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"GHSA-qxmc-6f24-g86g","url":"https://osv.dev/vulnerability/GHSA-qxmc-6f24-g86g"}],"summary":"baserCMS has OS Command Injection Leading to Remote Code Execution (RCE)"}