Whmcs_v861.zip

: Correcting issues related to the transition to PHP 8.1 and refining mail service integrations.

: Resolved multiple "Fatal Error" issues occurring in PHP 8.1 environments, specifically during server syncs, invoice generation with 100% discounts, and when certain suspension parameters were undefined. whmcs_v861.zip

The 8.6.1 update addressed several specific bugs across the system: : Correcting issues related to the transition to PHP 8

8.6 Change Log - WHMCS - Documentation

: This version reached End-of-Life (EOL) on October 31, 2023 . It is no longer supported and does not receive security patches. Changelog & Technical Improvements specifically during server syncs

Because version 8.6.1 is EOL, it is vulnerable to several newer security threats, including those addressed in the security update which targeted XSS and CSRF vulnerabilities.