CVE-2025-58365 is a high-severity vulnerability affecting the XWiki blog application (xwiki-contrib application-blog) versions prior to 9.14. The vulnerability is classified under CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code, commonly known as 'Eval Injection'. This flaw allows any user with edit rights on any page within the XWiki platform to execute arbitrary code remotely. Since typical users can edit their own user profiles, this effectively means any authenticated user can exploit the vulnerability. The exploit involves adding an object of type `Blog.BlogPostClass` to any page and inserting malicious script code into the "Content" field of that object. The vulnerable versions execute this content without proper authorization context, enabling remote code execution (RCE) with the privileges of the user who authored the blog post content. The vulnerability was patched in version 9.14 by ensuring that blog post content is executed with the rights of the appropriate author, mitigating unauthorized code execution. No known workarounds exist, and no exploits have been observed in the wild as of the publication date. The CVSS 4.0 base score is 8.7, reflecting the network attack vector, low attack complexity, no required authentication beyond edit rights (which are common), and high impact on confidentiality, integrity, and availability. This vulnerability is critical because it allows attackers to execute arbitrary code remotely, potentially leading to full system compromise or lateral movement within affected environments.

For European organizations using the XWiki platform with the vulnerable blog application version prior to 9.14, this vulnerability poses a significant risk. Attackers with minimal privileges (edit rights, which are commonly granted to authenticated users) can execute arbitrary code remotely, potentially leading to data breaches, unauthorized access, and disruption of services. Given that XWiki is often used for internal collaboration, knowledge management, and documentation, exploitation could lead to exposure of sensitive corporate information, intellectual property, or personal data protected under GDPR. The ability to execute code remotely also raises the risk of deploying malware, ransomware, or establishing persistent backdoors within organizational networks. This could disrupt business operations, damage reputation, and result in regulatory penalties. The lack of known workarounds means organizations must prioritize patching. The vulnerability's exploitation does not require user interaction beyond having edit rights, increasing the attack surface. European entities relying on XWiki for critical internal functions are particularly at risk, especially if they have not upgraded to the patched version or implemented compensating controls.

The primary and most effective mitigation is to upgrade the XWiki blog application to version 9.14 or later, where the vulnerability has been patched by executing blog post content with the correct author rights. Organizations should immediately inventory their XWiki deployments to identify affected versions. If immediate patching is not feasible, organizations should restrict edit rights to trusted users only, minimizing the number of users who can add or modify blog post content. Implementing strict access controls and monitoring for unusual editing activity can help detect potential exploitation attempts. Additionally, applying web application firewalls (WAFs) with custom rules to detect and block suspicious script macro insertions may provide temporary protection. Regularly auditing user permissions and ensuring that only necessary users have edit rights reduces risk. Finally, organizations should monitor logs for any signs of exploitation attempts and prepare incident response plans to quickly address any compromise.