{"id":"CVE-2021-22242","aliases":["BIT-gitlab-2021-22242","EUVD-2021-9388","GHSA-3r2f-rpgw-83gm","UBUNTU-CVE-2021-22242"],"status":"published","title":"Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 and up allows an...","description":"Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown","severity":{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.63555,"percentile":0.99219,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2021-08-25T18:38:24Z","modified":"2026-10-30T10:30:35Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["13.12.9","14.0.7","14.1.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"11.4.0"},{"fixed":"13.12.9"},{"introduced":"14.0.0"},{"fixed":"14.0.7"},{"introduced":"14.1.0"},{"fixed":"14.1.2"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gitlab","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.3+dfsg-9","8.4.3+dfsg-12","8.5.8+dfsg-5"]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/332528","tags":["x_refsource_MISC","x_transferred","Broken Link","web","report"]},{"url":"https://hackerone.com/reports/1212822","tags":["x_refsource_MISC","x_transferred","Permissions Required","Third Party Advisory","advisory","report"]},{"url":"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22242.json","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22242","tags":["web"]},{"url":"https://github.com/advisories/GHSA-3r2f-rpgw-83gm"},{"url":"https://ubuntu.com/security/CVE-2021-22242","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-22242","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-22242","description":"Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted 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markdown","status":"published","published":"2021-08-25T19:15:10.75Z","modified":"2026-06-17T03:36:52.287Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:57.67549Z"}],"osv":[{"id":"CVE-2021-22242","description":"Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted 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attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown","status":"published","published":"2024-03-06T11:19:20.574Z","modified":"2026-09-10T16:01:32.750549243Z","updated_at":"2026-11-02T15:28:29.999658Z"}]}}