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 PmWiki Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2010-4748) MediaWiki Incorrect Permission Assignment for Critical Resource Vulnerability (CVE-2021-30152) Jboss EAP Insertion of Sensitive Information into Log File Vulnerability (CVE-2019-10212) Drupal Core 7.x Multiple Vulnerabilities (7.0 - 7.17) XOOPS Other Vulnerability (CVE-2005-2112) 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 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N Tags Missing Update Known Vulnerabilities