The vulnerability exists because the delete function in the CYAN Backup WordPress plugin does not properly validate file paths, enabling an authenticated administrator or higher to delete any file on the server. A careless deletion of critical files such as wp-config.php can expose configuration details and may allow an attacker to execute arbitrary code through the compromised site.

The affected product is the CYAN Backup plugin by Greg Ross, with all releases up to and including version 2.5.4 susceptible to this vulnerability. The plugin is a WordPress extension commonly installed on WordPress sites where administrators possess elevated privileges.

The CVSS score of 6.5 indicates moderate severity, while an EPSS score of <1% suggests a very low probability of exploitation. The vulnerability is not currently listed in the CISA KEV catalog. An attacker would need valid administrator credentials to trigger the delete operation, but once authenticated they can supply arbitrary file paths, making the attack simple from a technical standpoint. Proper mitigation is therefore essential to prevent accidental or malicious file removal and subsequent compromise.