CVE-2025-13613: 
WordPress vulnerability analysis and mitigation

CVE-2025-13613 is an authentication bypass vulnerability in the Elated Membership plugin for WordPress, affecting all versions up to and including 1.2. The flaw allows unauthenticated attackers to log in as administrative users by exploiting improper login verification logic in the eltdf_membership_check_facebook_user and eltdf_membership_login_user_from_social_network functions. It was published on December 10, 2025, and assigned a CVSS v3.1 base score of 9.8 (Critical) (Wordfence, Red Hat CVE).

The root cause is classified as CWE-289 (Authentication Bypass by Alternate Name). The plugin's social network login flow verifies user data via eltdf_membership_check_facebook_user and eltdf_membership_login_user_from_social_network, but fails to properly enforce that the verified identity is bound to the session before completing the login process. An attacker can exploit this by first creating a temporary account (enabled by default through the plugin's temp user functionality), then supplying a target administrative user's email address to bypass authentication and assume that user's session. No privileges are required, no user interaction is needed, and the attack is conducted entirely over the network (Wordfence, ENISA EUVD).

Successful exploitation grants an unauthenticated attacker full administrative control over the affected WordPress site. This enables complete compromise of site data and content, modification of settings and configurations, and the potential installation of malicious plugins or backdoors for persistent access. All three security pillars — confidentiality, integrity, and availability — are rated as high impact (Wordfence, Red Hat CVE).

As of the time of reporting, there is no public proof-of-concept exploit and no evidence of active in-the-wild exploitation (Wordfence). The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. The EPSS score is approximately 0.296%, indicating a currently low probability of exploitation in the near term. A Nuclei detection template pull request was submitted to the ProjectDiscovery repository, suggesting growing researcher interest in automated detection (Nuclei Templates PR).

1. Reconnaissance: Identify WordPress sites running the Elated Membership plugin (version ≤ 1.2), associated with themes such as eSmart from ThemeForest. Tools like WPScan or Shodan can be used to fingerprint plugin presence.
2. Create a temporary account: Use the plugin's default temp user registration functionality to create a low-privilege or temporary account on the target site — no prior credentials are required.
3. Obtain target admin email: Gather the email address of an administrative user through public sources (e.g., WHOIS records, site contact pages, or social engineering).
4. Trigger the vulnerable social login flow: Invoke the eltdf_membership_login_user_from_social_network function with the administrative user's email address, bypassing the proper identity binding check that should follow eltdf_membership_check_facebook_user.
5. Achieve administrative session: The plugin logs the attacker in as the administrative user without proper verification, granting full WordPress admin access. The attacker can then install backdoor plugins, exfiltrate data, or modify site content (Wordfence, ENISA EUVD).

• Logs: WordPress authentication logs showing admin-level logins originating from unfamiliar IP addresses or at unusual times; log entries referencing eltdf_membership_login_user_from_social_network or eltdf_membership_check_facebook_user functions with unexpected email values.
• User Accounts: Presence of unexpected temporary or newly created user accounts in the WordPress user database, particularly those with no associated activity prior to an admin login event.
• File System: Newly installed or modified plugins not authorized by site administrators; presence of web shells or obfuscated PHP files in the WordPress uploads or plugins directories.
• Network: Outbound connections from the web server to unknown external IPs following a suspicious login event; unusual POST requests to WordPress login or AJAX endpoints associated with the Elated Membership plugin.

The primary remediation is to update the Elated Membership plugin to a version that resolves the authentication bypass (beyond version 1.2). If an update is not immediately available, the plugin should be temporarily disabled to eliminate the attack surface. Additional recommended actions include auditing all WordPress administrative accounts for unauthorized access, enabling two-factor authentication for admin users, and monitoring site logs for suspicious login activity (Wordfence, ENISA EUVD).

Wordfence, which discovered and reported the vulnerability, included it in their weekly WordPress vulnerability report for December 8–14, 2025 (Wordfence Weekly Report). The vulnerability was also referenced in CISA's weekly vulnerability bulletin and picked up by automated threat intelligence aggregators including Qualys and Patchstack (CISA Bulletin, Qualys). Community discussion has been limited, with no notable researcher commentary or significant social media debate beyond standard CVE tracking channels.