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' by sminozzi, affecting all versions up to and including 1.47. The vulnerability allows unauthenticated remote attackers to perform log file poisoning by injecting arbitrary content into the plugin's log files. This occurs because the plugin fails to properly sanitize or neutralize user-supplied input before writing it to logs, enabling attackers to insert malicious or malformed data. The primary consequence is the potential for denial of service (DoS) through disk space exhaustion, as attackers can flood the logs with large or repetitive entries, consuming storage resources. The vulnerability does not impact confidentiality but affects integrity (due to log manipulation) and availability (due to possible DoS). Exploitation requires no privileges or user interaction and can be performed remotely over the network, increasing the attack surface. Although no public exploits have been reported yet, the vulnerability's nature and ease of exploitation make it a credible threat. The CVSS v3.1 base score is 6.5, reflecting medium severity with network attack vector, low attack complexity, no privileges required, and no user interaction needed. The plugin is commonly used in WordPress environments for AI-assisted troubleshooting and site diagnostics, making affected sites potentially vulnerable to service disruption and log integrity issues.

For European organizations, the impact of CVE-2025-11627 primarily involves the risk of denial of service caused by log file poisoning leading to disk space exhaustion. This can disrupt website availability, affecting business operations, customer trust, and potentially leading to financial losses. The integrity of log files is compromised, which can hinder incident response and forensic investigations. Since the vulnerability requires no authentication, attackers can exploit it remotely, increasing the risk of widespread attacks on publicly accessible WordPress sites. Organizations relying on this plugin for site diagnostics may experience degraded service quality or downtime. Additionally, excessive log growth can strain storage infrastructure and increase maintenance costs. The absence of confidentiality impact reduces the risk of data breaches, but the availability and integrity concerns remain significant. European entities with high web traffic or limited monitoring of log files are particularly vulnerable. The threat also poses reputational risks if service disruptions become public. Overall, the vulnerability can affect operational continuity and incident management capabilities.

To mitigate CVE-2025-11627, European organizations should implement several specific measures beyond generic advice: 1) Immediately audit all WordPress installations for the presence of the affected 'Site Checkup Debug AI Troubleshooting with Wizard and Tips for Each Issue' plugin and identify versions up to 1.47. 2) Disable or remove the plugin if it is not critical to operations until a patch is released. 3) Monitor log file sizes and growth rates closely to detect abnormal increases indicative of log poisoning attempts. 4) Implement log rotation and retention policies to limit disk space usage and prevent exhaustion. 5) Restrict file system permissions to ensure that only authorized processes can write to log files, reducing the risk of unauthorized log manipulation. 6) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious input patterns targeting the plugin's logging functionality. 7) Stay informed about vendor updates and apply patches promptly once available. 8) Consider isolating the plugin's logging mechanism or redirecting logs to secure, monitored locations. 9) Conduct regular security assessments focusing on input validation and logging controls within WordPress environments. These targeted actions will reduce the risk of exploitation and limit potential damage.