CVE-2025-2939 is a deserialization vulnerability classified under CWE-502 found in the Ninja Tables – Easy Data Table Builder plugin for WordPress. This vulnerability exists in all versions up to and including 5.0.18 and arises from unsafe deserialization of untrusted input passed via the args[callback] parameter. The flaw allows unauthenticated attackers to perform PHP Object Injection, enabling them to inject crafted PHP objects into the application. The presence of a Property Oriented Programming (POP) chain in the plugin's codebase allows attackers to execute arbitrary PHP functions. However, the exploitation is limited because attackers cannot supply parameters to these functions, restricting the scope of malicious actions. The vulnerability has a CVSS 3.1 base score of 5.6, indicating medium severity, with attack vector network (AV:N), high attack complexity (AC:H), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and low impacts on confidentiality, integrity, and availability (C:L/I:L/A:L). No patches or fixes have been officially released at the time of publication, and no known exploits have been observed in the wild. This vulnerability primarily threatens WordPress sites using the affected plugin, potentially allowing attackers to execute limited arbitrary code or functions remotely without authentication.

The vulnerability could allow attackers to execute arbitrary PHP functions remotely without authentication, potentially leading to limited unauthorized actions on affected WordPress sites. Although the inability to supply parameters to functions limits the attacker's control, it still poses risks such as information disclosure, minor data manipulation, or service disruption. Organizations relying on Ninja Tables for data presentation or management may experience integrity and availability issues, especially if attackers chain this vulnerability with others. The impact is more pronounced for websites with sensitive data or critical business functions exposed via this plugin. Given the widespread use of WordPress globally, many organizations could be affected, particularly those that have not updated or mitigated this vulnerability. The absence of known exploits reduces immediate risk but does not eliminate the threat, as attackers may develop exploits over time.

1. Immediately audit all WordPress sites for the presence of Ninja Tables – Easy Data Table Builder plugin versions up to 5.0.18. 2. Disable or remove the plugin if it is not essential to reduce attack surface. 3. Monitor official vendor channels and security advisories for patches or updates addressing this vulnerability and apply them promptly once available. 4. Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious serialized payloads targeting the args[callback] parameter. 5. Restrict access to administrative and plugin-related endpoints to trusted IP addresses where feasible. 6. Conduct regular security assessments and code reviews to identify unsafe deserialization or similar vulnerabilities in custom or third-party plugins. 7. Educate site administrators about the risks of installing unverified plugins and the importance of timely updates. 8. Implement PHP configuration best practices such as disabling dangerous functions and enabling strict input validation to reduce exploitation risk.