{"id":"CVE-2021-27237","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-27237","generatedAt":"2026-10-27T20:21:16.631Z","title":"The admin panel in BlackCat CMS 1.3.6 allows stored XSS (by an admin) via the Display Name field to backend/preferences/ajax_save.php.","description":"The admin panel in BlackCat CMS 1.3.6 allows stored XSS (by an admin) via the Display Name field to backend/preferences/ajax_save.php.","published":"2021-02-16T19:15:13.000Z","lastModified":"2026-06-17T03:44:31.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":4.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["blackcat-cms/blackcat cms"],"epss":{"score":0.0096,"percentile":0.61285,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.96%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/BlackCatDevelopment/BlackCatCMS/commits/release-1.4/upload/backend/preferences/ajax_save.php","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/BlackCatDevelopment/BlackCatCMS/compare/1.3.6...1.4Beta","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/49565","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://github.com/BlackCatDevelopment/BlackCatCMS/commits/release-1.4/upload/backend/preferences/ajax_save.php","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/BlackCatDevelopment/BlackCatCMS/compare/1.3.6...1.4Beta","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/49565","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-27237","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}