CVE-2025-6366 is a critical privilege escalation vulnerability in the Event List plugin for WordPress, developed by ovatheme.com. The vulnerability exists in all versions up to and including 2.0.4 due to improper privilege validation in the el_update_profile() function. Specifically, the plugin fails to correctly verify a user's capabilities before allowing profile updates, enabling authenticated users with minimal privileges (Subscriber-level or above) to modify their own capabilities and elevate themselves to administrator status. This flaw violates the principle of least privilege and allows attackers to gain full administrative control over the WordPress site. The vulnerability is remotely exploitable over the network without requiring user interaction, increasing its risk profile. The CVSS 3.1 base score of 8.8 reflects the high impact on confidentiality, integrity, and availability, as an attacker can fully compromise the site, alter content, install malicious code, or disrupt services. Although no known exploits are currently reported in the wild, the straightforward exploitation path and the widespread use of WordPress and its plugins make this a significant threat. The vulnerability is categorized under CWE-269 (Improper Privilege Management), highlighting a fundamental security design flaw in access control enforcement within the plugin.

The impact of CVE-2025-6366 is severe for organizations running WordPress sites with the vulnerable Event List plugin. An attacker with minimal authenticated access can escalate privileges to administrator, gaining full control over the website. This can lead to unauthorized data disclosure, data modification, defacement, malware installation, and potential pivoting to other internal systems. The compromise of administrative credentials undermines the integrity and availability of the site, potentially causing reputational damage, loss of customer trust, and financial losses. For e-commerce or data-sensitive sites, this could mean exposure of personal or payment information. The vulnerability also increases the attack surface for further exploitation, such as deploying backdoors or ransomware. Given WordPress’s extensive use globally, the threat could affect a wide range of industries including media, education, government, and business sectors.

To mitigate CVE-2025-6366, organizations should immediately update the Event List plugin to a patched version once available from ovatheme.com. Until a patch is released, administrators should consider disabling or uninstalling the plugin to eliminate the attack vector. Implement strict access controls by limiting Subscriber-level accounts and auditing user roles regularly. Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious requests attempting to modify user capabilities. Monitor logs for unusual privilege changes or profile update activities. Additionally, enforce multi-factor authentication (MFA) for all administrative accounts to reduce risk if privilege escalation occurs. Regularly back up WordPress sites and databases to enable recovery in case of compromise. Finally, conduct security assessments and penetration testing focused on privilege escalation vectors within WordPress plugins to proactively identify similar issues.