CVE-2025-11824 identifies a stored Cross-Site Scripting (XSS) vulnerability in the Cinza Grid plugin for WordPress, specifically in the handling of the 'cgrid_skin_content' post meta field. This vulnerability arises from improper neutralization of input during web page generation, classified under CWE-79. The plugin fails to sufficiently sanitize and escape user-supplied input, allowing authenticated users with contributor-level access or higher to inject arbitrary JavaScript code that is stored persistently. When any user accesses a page containing the injected script, the malicious code executes in their browser context. This can lead to session hijacking, unauthorized actions, or further exploitation such as privilege escalation or data theft. The vulnerability affects all versions of the plugin up to and including 1.2.1. The CVSS v3.1 base score is 6.4, reflecting a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. The scope is changed, indicating that the vulnerability affects resources beyond the initially compromised component. No public exploits have been reported yet, but the risk remains significant due to the common use of WordPress and the plugin. The vulnerability primarily impacts confidentiality and integrity, with no direct effect on availability. The technical cause is insufficient input sanitization and output escaping in the plugin's code handling post meta content, allowing stored XSS payloads to persist and execute in users' browsers.

For European organizations, this vulnerability poses a risk to the confidentiality and integrity of web applications running WordPress with the Cinza Grid plugin. Attackers with contributor-level access can inject malicious scripts that execute in the browsers of site visitors, potentially leading to session hijacking, theft of sensitive information, unauthorized actions, or further compromise of user accounts. Organizations relying on WordPress for content management, especially those with multiple contributors or editors, are at heightened risk. The impact includes reputational damage, data breaches, and potential regulatory non-compliance under GDPR if personal data is exposed. Since the vulnerability does not affect availability, denial-of-service is less of a concern, but the ease of exploitation by authenticated users makes it a significant threat. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate it, as attackers may develop exploits rapidly once the vulnerability is public. European organizations with public-facing WordPress sites should consider this vulnerability a priority for remediation to prevent targeted attacks and lateral movement within their web infrastructure.

1. Immediately audit and restrict contributor-level and higher privileges to trusted users only, minimizing the risk of malicious input injection. 2. Monitor and review post meta fields, especially 'cgrid_skin_content', for suspicious or unexpected content that could indicate attempted exploitation. 3. Implement Web Application Firewall (WAF) rules to detect and block common XSS payload patterns targeting this plugin. 4. Apply input validation and output escaping at the application level, ensuring that any user-supplied content is properly sanitized before storage and rendering. 5. Stay alert for official patches or updates from the plugin vendor and apply them promptly once released. 6. Educate content contributors about the risks of injecting untrusted code or HTML into posts and pages. 7. Conduct regular security assessments and penetration tests focusing on WordPress plugins and custom meta fields. 8. Consider disabling or replacing the Cinza Grid plugin if immediate patching is not feasible, especially on high-value or sensitive sites. 9. Use Content Security Policy (CSP) headers to limit the impact of potential XSS by restricting script sources. 10. Maintain comprehensive logging and monitoring to detect anomalous activities related to post meta modifications.