CVE-2025-47536 is a high-severity vulnerability classified under CWE-502, which involves the deserialization of untrusted data in the keywordrush Content Egg plugin. Content Egg is a popular WordPress plugin used for affiliate marketing and content aggregation. The vulnerability allows an attacker with high privileges (PR:H) to perform object injection through unsafe deserialization processes. This can lead to remote code execution or other malicious actions impacting confidentiality, integrity, and availability of the affected system. The CVSS 3.1 score of 7.2 reflects a network attack vector (AV:N) with low attack complexity (AC:L), no user interaction (UI:N), and unchanged scope (S:U). The vulnerability affects versions up to 7.0.0, although the exact affected versions are not fully enumerated. No public exploits are known at this time, and no patches have been linked yet. The vulnerability requires the attacker to have high privileges on the system, which typically means an authenticated user with administrative rights. Exploitation could allow an attacker to inject malicious objects during deserialization, potentially leading to full system compromise or data breaches. The lack of user interaction requirement means that once the attacker has the necessary privileges, exploitation can be automated or triggered remotely over the network. This vulnerability is particularly critical in environments where Content Egg is used on publicly accessible WordPress sites, as it could be leveraged to escalate privileges or execute arbitrary code on the server hosting the plugin.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on WordPress-based websites using the Content Egg plugin for affiliate marketing or content aggregation. Exploitation could lead to unauthorized access to sensitive data, defacement of websites, injection of malicious content, or use of compromised servers as pivot points for further attacks within the corporate network. This can result in reputational damage, loss of customer trust, regulatory fines under GDPR for data breaches, and operational disruptions. Organizations in sectors such as e-commerce, digital marketing, media, and publishing are particularly at risk. Additionally, the requirement for high privileges means that insider threats or compromised administrator accounts could be leveraged to exploit this vulnerability, increasing the risk of insider attacks or lateral movement within networks. Given the widespread use of WordPress in Europe and the popularity of affiliate marketing plugins, the potential attack surface is considerable. The absence of known public exploits currently provides a window for mitigation before widespread exploitation occurs.

1. Immediate mitigation should include auditing and restricting administrative access to WordPress sites running Content Egg to trusted personnel only, minimizing the risk of privilege misuse. 2. Monitor and review logs for suspicious activity related to deserialization or plugin usage. 3. Disable or remove the Content Egg plugin if it is not essential to reduce the attack surface. 4. Implement web application firewalls (WAFs) with rules to detect and block malicious deserialization payloads targeting WordPress plugins. 5. Apply principle of least privilege on WordPress user roles to prevent unnecessary high privilege assignments. 6. Stay alert for official patches or updates from keywordrush and apply them promptly once available. 7. Conduct regular security assessments and penetration testing focusing on deserialization vulnerabilities and plugin security. 8. Consider isolating WordPress instances in segmented network zones to limit potential lateral movement in case of compromise. 9. Educate administrators on the risks of deserialization vulnerabilities and the importance of secure plugin management.