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 GlassFish CVE-2017-3626 Vulnerability (CVE-2017-3626) WordPress Plugin Youzify-BuddyPress Community, User Profile, Social Network & Membership for WordPress Cross-Site Scripting (1.0.6) Ember.js Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2014-0013) Oracle Database Server CVE-2012-0519 Vulnerability (CVE-2012-0519) Liferay Portal CVE-2020-13444 Vulnerability (CVE-2020-13444) 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