CVE-2025-6389 is a critical remote code execution (RCE) vulnerability identified in the Sneeit Framework plugin for WordPress, affecting all versions up to and including 8.3. The vulnerability stems from improper control of code generation (CWE-94) within the sneeit_articles_pagination_callback() function. This function accepts user-supplied input and passes it directly to PHP's call_user_func() without adequate validation or sanitization. As a result, an unauthenticated attacker can craft malicious input that causes arbitrary PHP functions or code to be executed on the server hosting the WordPress site. This can lead to full system compromise, including the ability to inject backdoors, manipulate site content, or create new administrative user accounts, thereby escalating privileges. The vulnerability is remotely exploitable over the network without any authentication or user interaction, as reflected by its CVSS 3.1 score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). Although no exploits are publicly known at this time, the severity and ease of exploitation make it a critical threat. The Sneeit Framework is a popular WordPress plugin, increasing the potential attack surface. The vulnerability was reserved in June 2025 and published in November 2025, with no patches currently available, emphasizing the urgency for mitigation and monitoring.

For European organizations, this vulnerability poses a significant risk due to the widespread use of WordPress and associated plugins like Sneeit Framework in websites and intranet portals. Successful exploitation can lead to complete server compromise, allowing attackers to steal sensitive data, deface websites, disrupt services, or establish persistent backdoors. This can result in reputational damage, regulatory penalties under GDPR for data breaches, and operational downtime. Critical sectors such as finance, healthcare, government, and e-commerce, which rely heavily on web presence, are particularly vulnerable. The ability to create new administrative accounts further exacerbates the threat by enabling long-term unauthorized access. Additionally, compromised sites can be leveraged to launch further attacks within organizational networks or against third parties. The lack of authentication requirement and ease of exploitation increase the likelihood of attacks, potentially leading to widespread impact across European digital infrastructure.

Immediate mitigation steps include: 1) Monitoring network traffic and web server logs for suspicious requests targeting the sneeit_articles_pagination_callback() function or unusual use of call_user_func(). 2) Applying any available patches or updates from the Sneeit Framework vendor as soon as they are released. 3) Temporarily disabling or removing the Sneeit Framework plugin if patching is not immediately possible. 4) Implementing Web Application Firewall (WAF) rules to block or sanitize inputs targeting the vulnerable function, specifically filtering out unexpected function calls or parameters. 5) Restricting access to the WordPress admin and plugin endpoints via IP whitelisting or VPN access to reduce exposure. 6) Conducting thorough audits of user accounts to detect unauthorized administrative users and reviewing server integrity for backdoors. 7) Educating administrators on the risks and signs of exploitation to enable rapid incident response. 8) Employing runtime application self-protection (RASP) tools to detect and prevent code injection attempts in real-time. These measures go beyond generic advice by focusing on immediate containment, monitoring, and access control tailored to this specific vulnerability.