Description Cross-site Scripting (XSS) vulnerability in MyBB before 1.8.26 via Nested Auto URL when parsing messages. Remediation References CVE-2021-27889 Related Vulnerabilities MySQL CVE-2018-2846 Vulnerability (CVE-2018-2846) WordPress 4.8.x Multiple Vulnerabilities (4.8 - 4.8.5) Ruby Other Vulnerability (CVE-2014-8080) WordPress Plugin Elementor Website Builder Arbitrary File Upload (2.7.4) PHP Resource Management Errors Vulnerability (CVE-2010-2093) Severity Medium Classification CVE-2021-27889 CWE-707 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Tags Missing Update Known Vulnerabilities