PL3 was released as a security and bug-fix update for the 3.8.7 branch, which is now considered end-of-life (EOL).
If you are looking to run a forum today, it is strongly recommended to use the latest supported versions of vBulletin 6.x or a modern open-source alternative that is compatible with current, secure PHP versions. Known vulnerabilities in vBulletin vBulletin 3.8.7
When you use a "nulled" version, you are running unpatched code that is an open invitation for hackers to take control of your server. 2. The Danger of Malicious Backdoors
vBulletin (PL3) is a legacy maintenance release of the vBulletin forum software, primarily designed to address security vulnerabilities and provide compatibility fixes for older web environments. Key Version Details
: Another free, robust option with a massive community and plenty of "vB-style" themes. Direct Verdict