Description MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode). Remediation References CVE-2021-27279 Related Vulnerabilities Python Uncontrolled Resource Consumption Vulnerability (CVE-2020-8492) MySQL CVE-2017-3291 Vulnerability (CVE-2017-3291) Liferay Portal Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2022-38901) WordPress Plugin Our Team Showcase Cross-Site Request Forgery (1.2) WordPress Plugin Easy Accept Payments for PayPal Cross-Site Scripting (4.9.9) 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