MyBB 1.8.3
Security
code 1803
Full Package
Install a new MyBB forum or upgrade from older versions.
Changed Files
Upgrade from the previous version.
Upgrading to this Version
Before performing any upgrade, remember to backup your forum’s files and database and store them safely.
If you have edited core files, including language files, please make sure you make a changelog for these changes so you can make them again (if necessary) once the upgrade is complete.
Follow the Upgrade Documentation for more detailed instructions.
Security Vulnerabilities Addressed (1)
A SQL injection vulnerability in theme selection
A XSS vulnerability related to post icons
CWE-79
CVSS:3.1/PR:H
Reported by Destroy666
MyBB Team