CVE-2026-111120: VikRentCar Car Rental Management System <= 1.4.8 - Cross-Site Request Forgery to Remote Code Execution via 'condtext_update_tmpl' AJAX Task

The VikRentCar Car Rental Management System plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.4.8. This is due to missing or incorrect nonce validation on the condtextupdatetmpl function. This makes it possible for unauthenticated attackers to write arbitrary PHP code to the plugin's executable template files such as site/helpers/emailtmpl.php, which are later include()d by loadEmailTemplate() and loadPdfTemplate(), achieving remote code execution on the server via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. The injected PHP payload bypasses sanitization because the plugin's own PHPOPEN/PHPCLOSE placeholder expansion and cleanPHPSourceCode() logic explicitly reverse both sanitizetextfield filtering and saveHTML() HTML-encoding, restoring a literal <?php...?> payload to live PHP before it is written to disk. Successful exploitation additionally requires an action by an administrator — the attacker cannot trigger the vulnerability on their own.