CVE-2025-11627 is a vulnerability classified under CWE-117 (Improper Output Neutralization for Logs) found in the WordPress plugin 'Site Checkup Debug AI Troubleshooting with Wizard and Tips for Each Issue' developed by sminozzi. This vulnerability affects all versions up to and including 1.47. The core issue is that the plugin fails to properly sanitize or neutralize input before writing it to log files, enabling unauthenticated remote attackers to inject arbitrary content into these logs. Such log file poisoning can be exploited to fill disk space, causing denial of service (DoS) conditions by exhausting storage resources. The CVSS v3.1 score is 6.5 (medium severity), reflecting the network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), no confidentiality impact (C:N), low integrity impact (I:L), and low availability impact (A:L). Although no known exploits have been reported in the wild, the vulnerability poses a risk to the availability and integrity of affected WordPress sites. The plugin is used primarily for debugging and troubleshooting, which means affected sites may be development or production environments relying on this plugin for diagnostics. The lack of patch links indicates that a fix may not yet be publicly available, emphasizing the need for interim mitigations.

For European organizations, this vulnerability can lead to denial of service through disk space exhaustion, potentially disrupting business-critical websites or services relying on WordPress with this plugin installed. While it does not expose sensitive data directly, the integrity of log files is compromised, which can hinder incident response and forensic investigations. Organizations in sectors with high web presence such as e-commerce, media, and public services could face operational interruptions. The unauthenticated nature of the exploit increases the risk as attackers do not need credentials or user interaction, enabling widespread scanning and exploitation attempts. This could also be leveraged as part of multi-stage attacks where denial of service is used as a distraction or to degrade defenses. The impact is particularly significant for organizations with limited monitoring of log file sizes or insufficient disk space management policies.

1. Immediately audit WordPress sites to identify installations of the vulnerable plugin and disable or remove it if not essential. 2. Monitor log file sizes and disk usage closely to detect abnormal growth indicative of log poisoning attempts. 3. Implement file system quotas or alerts to prevent disk exhaustion. 4. Restrict write permissions on log files and directories to minimize unauthorized modifications. 5. Employ web application firewalls (WAFs) to detect and block suspicious requests targeting the plugin’s logging functionality. 6. Regularly update WordPress and plugins; apply vendor patches promptly once available. 7. Consider isolating logging mechanisms or redirecting logs to external systems less susceptible to poisoning. 8. Enhance monitoring and alerting on server resource usage to enable rapid response to DoS conditions. 9. Educate development and operations teams about the risks of improper log sanitization and secure coding practices.