CVE-2025-2105 is a deserialization vulnerability classified under CWE-502 affecting the Jupiter X Core plugin for WordPress, versions up to and including 4.8.11. The vulnerability arises from unsafe deserialization of untrusted input through the 'file' parameter in the 'raven_download_file' function, allowing PHP Object Injection via specially crafted PHAR files. Deserialization of untrusted data can lead to arbitrary code execution if a suitable POP (Property Oriented Programming) gadget chain exists in the environment. However, Jupiter X Core itself does not contain a POP chain, so exploitation depends on the presence of other plugins or themes that provide such chains. Attackers can exploit this vulnerability remotely without authentication if the site has a form that allows file downloads and uploads; otherwise, at least Contributor-level privileges are required to create the exploit vector. The vulnerability impacts confidentiality, integrity, and availability, with potential consequences including arbitrary file deletion, sensitive data exposure, and remote code execution. The CVSS 3.1 base score is 8.1 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H), reflecting high severity but requiring high attack complexity. No patches or public exploits are currently known, but the risk is significant given the widespread use of WordPress and the Jupiter X Core plugin in particular.

The vulnerability poses a significant risk to organizations running WordPress sites with the Jupiter X Core plugin, especially those that also use other plugins or themes containing POP chains. Successful exploitation can lead to remote code execution, arbitrary file deletion, and disclosure of sensitive information, severely compromising the confidentiality, integrity, and availability of affected systems. This can result in website defacement, data breaches, service disruption, and potential lateral movement within the hosting environment. Since the vulnerability can be exploited remotely without authentication under certain conditions, it increases the attack surface for threat actors. Organizations relying on WordPress for critical business functions or hosting sensitive data are particularly at risk. The absence of known public exploits currently limits immediate widespread exploitation, but the vulnerability’s high CVSS score and ease of remote exploitation under certain conditions make it a high-priority threat.

1. Immediately update the Jupiter X Core plugin to a patched version once available from the vendor. 2. In the absence of a patch, disable or restrict access to the 'raven_download_file' function or any forms that allow file downloads and uploads to prevent exploitation. 3. Audit installed plugins and themes to identify and remove or update those that contain POP chains, reducing the risk of successful exploitation. 4. Implement strict file upload controls, including file type validation, size limits, and scanning for malicious content. 5. Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious PHAR file uploads or deserialization attempts targeting the vulnerable parameter. 6. Monitor logs for unusual activity related to file uploads, downloads, and deserialization functions. 7. Restrict Contributor-level and higher privileges to trusted users only, minimizing the risk of privilege abuse to create exploit forms. 8. Regularly back up website data and configurations to enable rapid recovery in case of compromise. 9. Conduct security assessments and penetration testing focusing on deserialization vulnerabilities and plugin/theme interactions.