CVE-2024-7432 is a deserialization vulnerability classified under CWE-502 affecting the Unseen Blog WordPress theme developed by ultrapressorg. The flaw arises from unsafe deserialization of untrusted input, enabling PHP Object Injection. This vulnerability affects all versions up to and including 1.0.0. An attacker with at least Contributor-level access can craft malicious serialized PHP objects that, when deserialized by the theme, may lead to code execution or other malicious actions if a suitable POP chain is available from other installed plugins or themes. Without a POP chain, the vulnerability cannot be fully exploited to execute arbitrary code but may still pose risks such as data leakage or file deletion if combined with other vulnerable components. The CVSS v3.1 score is 8.8 (high), reflecting network attack vector, low attack complexity, and significant impact on confidentiality, integrity, and availability. No user interaction is required beyond authentication. The vulnerability was publicly disclosed on October 1, 2024, with no known exploits in the wild and no patches currently available. The vulnerability highlights the risks of unsafe deserialization in PHP applications, especially in extensible platforms like WordPress where multiple plugins and themes may interact.

The impact of CVE-2024-7432 is significant for organizations using the Unseen Blog WordPress theme. An attacker with Contributor-level access can exploit this vulnerability to inject malicious PHP objects, potentially leading to remote code execution, arbitrary file deletion, or sensitive data exposure if a suitable POP chain exists in the environment. This could result in full site compromise, data breaches, defacement, or service disruption. Since WordPress powers a large portion of websites globally, including blogs, corporate sites, and e-commerce platforms, the vulnerability poses a high risk to website integrity and availability. The requirement for authenticated access limits the attack surface but does not eliminate risk, especially on sites with multiple contributors or weak account controls. The absence of a patch increases exposure time, and attackers may combine this vulnerability with others to escalate privileges or move laterally. Organizations could face reputational damage, regulatory penalties, and operational downtime if exploited.

To mitigate CVE-2024-7432, organizations should immediately audit and restrict Contributor-level and higher user accounts to trusted personnel only, minimizing the number of users who can exploit this vulnerability. Disable or remove the Unseen Blog theme if it is not essential. Monitor logs for suspicious deserialization attempts or unusual file operations. Employ web application firewalls (WAFs) with custom rules to detect and block malicious serialized payloads targeting this theme. Conduct a thorough review of all installed plugins and themes to identify potential POP chains that could be leveraged in exploitation, and update or remove vulnerable components. Until an official patch is released, consider isolating WordPress instances with this theme in a restricted network segment. Implement strong authentication mechanisms such as multi-factor authentication (MFA) to reduce the risk of compromised contributor accounts. Regularly back up website data and test restoration procedures to minimize impact in case of compromise. Stay informed about updates from the vendor and apply patches promptly once available.