A critical vulnerability, identified as CVE-2024-10470, has been found in WPLMS, a widely used WordPress theme designed for online course management. The flaw, which carries a CVSS score of 9.8, allows unauthenticated attackers to read and delete sensitive files, including the crucial wp-config.php file. With over 28,000 sites running this theme, the vulnerability exposes a significant number of WordPress installations to the risk of data loss, site disruption, and potential takeover. The vulnerability exists in the envato-setup-export.php file, which lacks proper security checks. Specifically, it allows attackers to exploit an unsanitized zip_file parameter, enabling them to target any file on the server. Once a file is specified, the vulnerable code reads the file’s content using the readfile() function and then deletes it with the unlink() function. This sequence of actions makes it possible for attackers to delete critical files, such as wp-config.php, as well as user-uploaded content, leaving the site vulnerable to further exploitation. The consequences of this vulnerability extend beyond unauthorized file deletion. If an attacker deletes the wp-config.php file, they can force the site into setup mode, which disconnects it from its database. This opens the door for attackers to take control of the site by connecting it to a malicious database, effectively allowing them to hijack the site and compromise sensitive user data. This vulnerability can result in a full site takeover, putting both the site's integrity and user security at severe risk. The flaw was responsibly reported by researcher Foxyyy through Wordfence’s Bug Bounty Program, earning a $900 bounty for the discovery. To address this issue, Wordfence recommends that all WPLMS users update to version 4.963 or later, which includes a patch to resolve the vulnerability. Administrators are strongly advised to apply the update immediately to secure their sites and mitigate the risk of exploitation.
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