{"cve":"CVE-2021-27903","nvd":{"published":"2021-06-30T12:15:07.643","modified":"2026-06-17T03:45:34.940","status":"Modified","description":"An issue was discovered in Craft CMS before 3.6.7. In some circumstances, a potential Remote Code Execution vulnerability existed on sites that did not restrict administrative changes (if an attacker were somehow able to hijack an administrator's session).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-862"],"references":["https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#367---2021-02-23","https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#security","https://github.com/craftcms/cms/commit/c17728fa0bec11d3b82c34defe0930ed409aec38","https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#367---2021-02-23","https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#security"],"products":["craftcms:craft_cms"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-27903","score":0.02819,"percentile":0.86564,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}