Description MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode). Remediation References CVE-2021-27279 Related Vulnerabilities WordPress Plugin Responsive Slider-Image Slider-Slideshow for WordPress Unspecified Vulnerability (3.0.8) Ruby Other Vulnerability (CVE-2012-5380) WordPress Plugin Traffic Manager Multiple Vulnerabilities (1.4.5) WordPress Plugin Sendit WP Newsletter 'id' Parameter SQL Injection (2.1.0) phpMyAdmin Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2016-2039) 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