CVE-2024-6386

The vulnerability in the WPML plugin for WordPress arises from a critical flaw in its handling of server-side template rendering, specifically through the Twig templating engine. This flaw is characterized by inadequate input validation and sanitization processes within the render function, which allows for the injection of malicious code. When an attacker is able to manipulate the input to this function, they can execute arbitrary code on the server. The vulnerability affects all versions of the plugin up to and including 4.6.12, making it a significant risk for any WordPress site utilizing this plugin.

Exploitation of this vulnerability can occur through various attack vectors, primarily targeting authenticated users with Contributor-level access or higher. An attacker could craft a malicious payload that, when processed by the vulnerable render function, executes arbitrary code on the server. For example, an attacker could upload a specially crafted template file or manipulate existing templates to include malicious code. Once executed, this could lead to a complete compromise of the web server, allowing the attacker to install backdoors, exfiltrate sensitive data, or further pivot within the network.

The real-world implications of this vulnerability are profound, particularly for businesses that rely on WordPress for their online presence. Given the widespread use of the WPML plugin for multilingual capabilities, many organizations could find themselves at risk. The potential for remote code execution means that an attacker could gain full control of the affected server, leading to data breaches, defacement of websites, or even the deployment of ransomware. The financial and reputational damage from such incidents can be substantial, with businesses facing regulatory fines, loss of customer trust, and significant recovery costs.

To detect this vulnerability, organizations should implement regular security audits and vulnerability scanning tailored to their WordPress installations. Monitoring for unusual activity, such as unexpected file changes or unauthorized access attempts, can also help in identifying potential exploitation attempts. Additionally, maintaining an up-to-date inventory of plugins and their versions is crucial for ensuring that any known vulnerabilities are promptly addressed.

Mitigation strategies should focus on immediate actions, such as updating the WPML plugin to the latest version, which includes patches for this vulnerability. Furthermore, organizations should enforce the principle of least privilege, ensuring that only necessary users have access to sensitive functionalities within the WordPress admin interface. Implementing Web Application Firewalls (WAFs) can also provide an additional layer of security by filtering out malicious requests before they reach the application. Overall, a proactive approach to security, including regular updates, monitoring, and user access controls, is essential to safeguard against such vulnerabilities.

The CVSS score for CVE-2024-6386 has been revised upward from 8.8 to 9.9, reflecting a reassessment of the vulnerability’s criticality. This adjustment underscores a heightened recognition of the exploit’s potential impact and ease of exploitation, particularly given the low privilege level required for successful attacks. CSURFACE threat intelligence notes that while the EPSS score remains stable at a very high percentile, new proof-of-concept exploits have emerged on public repositories, increasing the accessibility of attack methods to a broader range of adversaries. Our telemetry indicates a steady but persistent interest in leveraging this vulnerability, which, combined with the critical severity rating, elevates the overall threat posture. This change signals that defenders must regard CVE-2024-6386 as an immediate and severe risk, as the vulnerability enables authenticated contributors to execute arbitrary code remotely, potentially leading to full server compromise. The increased CVSS score aligns with the growing exploitation potential and the availability of attack tools, thereby intensifying the urgency for detection and response measures within affected environments.

Update 2 — May 21, 2026

Recent CSURFACE threat intelligence indicates a downward revision of the CVSS score for CVE-2024-6386 from 9.9 to 8.8, reflecting a more precise understanding of the vulnerability’s exploitability and impact. This adjustment stems from refined analysis of the attack vector and required privileges—specifically, the necessity for authenticated Contributor-level access—which slightly limits the ease of exploitation compared to initial assessments. Despite this reduction, the vulnerability remains classified as high severity, supported by stable EPSS metrics that place it near the top percentile for exploitation likelihood. Our telemetry continues to detect steady interest in publicly available proof-of-concept exploits, underscoring persistent adversary focus. This nuanced recalibration matters because it refines risk prioritization for defenders, emphasizing that while the threat remains urgent, the attack surface is somewhat constrained by authentication requirements. Consequently, the threat level remains elevated but with a clearer context for resource allocation and monitoring strategies within affected WordPress environments.