Version 8.13.1 (Maintenance)

Maintenance
We are limiting technical details on these changes to protect users who may not yet have upgraded.

● 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

● 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

Modules
● WHMCS-21375 — Ensure only partial payment amount is capture when appropriate for invoices paid by PayPal Payments (Also known as: MODULE-8180)


**Note** - Not recommended to update it on the operational site. Use only for testing purposes, as it is a maintenance release by WHMCS.