{"id":"CVE-2021-27279","details":"MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode).","aliases":["GHSA-6483-hcpp-p75w"],"modified":"2026-07-08T06:28:26.045295168Z","published":"2021-02-22T20:15:13.243Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"fixed":"1.8.25"}],"source":"CPE_RANGE","vendor_product":"mybb:mybb","cpes":["cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*"]},{"extracted_events":[{"fixed":"1.8.25"}],"source":"DESCRIPTION"}]},"references":[{"type":"ADVISORY","url":"https://mybb.com/versions/1.8.25/"},{"type":"FIX","url":"https://github.com/mybb/mybb/commit/cb781b49116bf5c4d8deca3e17498122b701677a"},{"type":"EVIDENCE","url":"https://github.com/mybb/mybb/security/advisories/GHSA-6483-hcpp-p75w"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mybb/mybb","events":[{"introduced":"0"},{"fixed":"cb781b49116bf5c4d8deca3e17498122b701677a"}],"database_specific":{"source":"REFERENCES"}}],"versions":["mybb_1824","mybb_1823_build","mybb_1823","mybb_1822","mybb_1822_build","mybb_1821pl1","mybb_1821","mybb_1821_build","mybb_1817_build","mybb_1817","mybb_1820","mybb_1820_build","mybb_1820-rc","mybb_1819","mybb_1818","mybb_1819_build","mybb_1818_build","mybb_1816","mybb_1816_build","mybb_1815","mybb_1815_build","mybb_1814","mybb_1813","mybb_1812","mybb_1811","mybb_1810","mybb_1809","mybb_1808","mybb_1807","mybb_1806","mybb_1805","mybb_1804","mybb_1800","mybb_1801"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27279.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}