WHMCS 8.13.1
3 June 2025
WHMCS version 8.13.1 is now available (security release).
Upgrading to WHMCS 8.13.1
WHMCS 8.13.1 can be upgraded to (or installed) using any of Installatron's products. Use Installatron's optional Automatic Update feature to automatically apply WHMCS updates as new versions are released, or use Installatron's Clone feature to duplicate an existing WHMCS install to test the 8.13.1 upgrade prior to applying it live. Get started managing your WHMCS installations with Installatron
What's New in WHMCS 8.13.1
Security
- WHMCS-19435 — Undisclosed Security Fix
- WHMCS-19947 — Undisclosed Security Fix
- WHMCS-19950 — Undisclosed Security Fix
- WHMCS-19952 — Undisclosed Security Fix
- WHMCS-19953 — Undisclosed Security Fix
- WHMCS-19954 — Undisclosed Security Fix
- WHMCS-19955 — Undisclosed Security Fix
- WHMCS-19957 — Undisclosed Security Fix
- WHMCS-19958 — Undisclosed Security Fix
- WHMCS-19959 — Undisclosed Security Fix
- WHMCS-19960 — Undisclosed Security Fix
- WHMCS-19967 — Undisclosed Security Fix
- WHMCS-19981 — Undisclosed Security Fix
- WHMCS-19983 — Undisclosed Security Fix
- WHMCS-19984 — Undisclosed Security Fix
- WHMCS-19987 — Undisclosed Security Fix
- WHMCS-19992 — Undisclosed Security Fix
- WHMCS-20029 — Undisclosed Security Fix
- WHMCS-20064 — Undisclosed Security Fix
- WHMCS-20066 — Undisclosed Security Fix
- WHMCS-21726 — Undisclosed Security Fix
- WHMCS-21729 — Undisclosed Security Fix
- WHMCS-21763 — Undisclosed Security Fix
- WHMCS-21765 — Undisclosed Security Fix
- WHMCS-21766 — Undisclosed Security Fix
- WHMCS-21768 — Undisclosed Security Fix
- WHMCS-21769 — Undisclosed Security Fix
- WHMCS-21862 — Undisclosed Security Fix
- WHMCS-21884 — Undisclosed Security Fix
- WHMCS-21998 — Undisclosed Security Fix
- WHMCS-22041 — Undisclosed Security Fix
Bug Fixes and Changes
- WHMCS-18936 — Prevent error when sending email from custom email template with bad attachment reference
- WHMCS-19766 — Disabling auto renewal for a domain in the admin area does not cancel the renewal invoice
- WHMCS-22025 — Clarify Ioncube Loader Minimum version for PHP 8.3
- WHMCS-22090 — Improve Activity Log entry for Admin-initiated User password change
- WHMCS-22228 — Layout changes on Client Area homepage after switching the theme (Also known as: WHMCS-22280)
- WHMCS-22233 — Improve formatting for invoice modification log entries
- WHMCS-22245 — Improve CSS for MarketConnect DigiCert landing page
- WHMCS-22289 — Honour parent theme definition for captcha.tpl on Login as Owner link
- WHMCS-22304 — Correct regression for target opening of custom module actions (styled as links) in clientarea sidebar
- WHMCS-22308 — Ensure ticket scheduled actions can be updated or cancelled when language is not set to English
- WHMCS-22450 — Improve visual responsiveness for SocialBee MarketConnect landing page
- WHMCS-22456 — Correct alignment of Admin Global Warning text
- WHMCS-22457 — Correct regression for displaying embedded videos in Knowledgebase articles