Description MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode). Remediation References CVE-2021-27279 Related Vulnerabilities MySQL CVE-2022-21309 Vulnerability (CVE-2022-21309) Roundcube Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2020-18670) phpMyAdmin Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2012-4219) MySQL CVE-2016-0504 Vulnerability (CVE-2016-0504) Joomla Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') Vulnerability (CVE-2019-10945) Severity Medium Classification CVE-2021-27279 CWE-707 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Tags Missing Update Known Vulnerabilities