Description MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode). Remediation References CVE-2021-27279 Related Vulnerabilities XWiki Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Vulnerability (CVE-2023-29516) CKEditor Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2020-27193) PHP-Fusion Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Vulnerability (CVE-2020-12461) WordPress Plugin Great Restaurant Menu WP SQL Injection (1.4.1) WordPress Plugin Product Slider for WooCommerce by PickPlugins Cross-Site Scripting (1.13.41) 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