Version 7.5.3 Release Notes

From WHMCS Documentation

Release Information
Version: 7.5.3
Release Type: Maintenance
Release Date: 21st January 2019
Distribution Types: Full Version, Incremental and via Automatic Updater


Download the latest version of WHMCS from

Upgrade Process

View Standard Upgrade Steps

Automatic Updating

If you are running WHMCS 7.0 or later, you can use the built-in Automatic Update utility.

Simply navigate to Utilities > Update WHMCS to begin the process.

  If the update was released recently, you may need to click the Check for Updates button before the update will show as available.
WHMCS v7.5.3 requires Ioncube Loader 10.1 or higher. The Automatic Updater verifies this requirement for you in v7.4.2. If you are using the Automatic Updater and are not yet on v7.4.2, then you will not see the v7.5.3 update but only v7.4.2. Use the Auto Updater to first update to v7.4.2. After this, v7.5.3 will viewable and the Automatic Updater will be able to verify all requirements before proceeding to this latest version.

For more information about the Automatic Updater and troubleshooting please refer to the Automatic Updater documentation.

Release Notes

This release provides hotfixes already published along with security related updates. A full list of change can be found in the changelog.

Library Updates

The following libraries have been updated

  • smarty/smarty: 3.1.29 to 3.1.33
  • tecnickcom/tcpdf: 6.2.12 to 6.2.26

Template Changes

No template changes have been made for this release.



CORE-12787 - Correct WHMCS Installer input processing
CORE-12796 - Correct Twitter data processing
CORE-12814 - Improve date parameter processing
CORE-12838 - Correct email template policy
CORE-12843 - Update Smarty to correct a template processing issue
CORE-12853 - Update TCPDF to 6.2.22
CORE-12879 - Correct variable usage when rendering admin affiliate overview
CORE-12928 - Correct knowledgebase input validation
CORE-13057 - Correct logic for aggregate search fields
CORE-13073 - Improve input sanitization for API


CORE-12258 - Ensure addon data is provided to Welcome Email Template
CORE-12278 - Improve logic for Join Our Mailing list toggle
CORE-12284 - Correct link from Create Notifications template
CORE-12285 - Prevent Data Retention from erroneously removing new clients without activity
CORE-12307 - Correct handling of additional extension options when configuring new TLDs
CORE-12694 - Update ECB Exchange Rates URL
CORE-13042 - Ensure links in Tweets are parsed


MODULE-6765 - Correct arguments used in cPanel backup API call
MODULE-6768 - Correct country and phone number handling in InternetBS module


CORE-12257 - Apply additional date formatting in addinvoicepayment for iOS agents
    Also known as: IOS-139
CORE-12309 - Correct autorecalc recurring amount logic for UpdateClientDomain