CVE-2025-63888 is a critical remote code execution (RCE) vulnerability located in the read function of the File.php file within the ThinkPHP framework version 5.0.24. ThinkPHP is a popular PHP framework used to build web applications, and the vulnerability resides in the template driver component responsible for file handling. The flaw allows an attacker to remotely execute arbitrary code by exploiting improper input validation or sanitization in the file reading process, potentially enabling full system compromise. Although no CVSS score or patch links are currently available, the vulnerability's nature suggests it can be exploited without authentication or user interaction, increasing its risk profile. No known exploits have been reported in the wild yet, but the vulnerability's publication date indicates that attackers may develop exploits soon. The lack of patch information requires organizations to monitor vendor advisories closely and implement compensating controls. The vulnerability affects all applications running ThinkPHP 5.0.24 that utilize the vulnerable template driver, which is common in many web applications, making the attack surface broad. This RCE can lead to unauthorized access, data theft, service disruption, and further lateral movement within compromised networks.

For European organizations, the impact of CVE-2025-63888 can be severe. Successful exploitation could lead to complete compromise of web servers hosting vulnerable ThinkPHP applications, resulting in data breaches, defacement, or ransomware deployment. Confidentiality is at risk due to potential data exfiltration, while integrity and availability may be compromised through unauthorized code execution and service disruption. Organizations in sectors such as finance, healthcare, e-commerce, and government, which often rely on web applications, face heightened risks. The broad use of ThinkPHP in small to medium enterprises across Europe increases the likelihood of widespread exposure. Additionally, compromised systems could be leveraged as pivot points for further attacks within corporate networks. The absence of a patch and public exploits means organizations must act proactively to mitigate risks. Failure to address this vulnerability could lead to regulatory penalties under GDPR if personal data is exposed.

1. Immediate identification of all ThinkPHP 5.0.24 instances within the organization’s environment using asset management and vulnerability scanning tools. 2. Monitor official ThinkPHP channels and security advisories for the release of patches or updates addressing CVE-2025-63888 and apply them promptly. 3. Implement strict file system permissions to limit the web server’s ability to read or write arbitrary files, reducing the attack surface. 4. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the vulnerable read function. 5. Conduct thorough code reviews and input validation audits on custom templates and file handling logic to identify and remediate unsafe practices. 6. Enable detailed logging and monitoring of web server and application activities to detect anomalous behavior indicative of exploitation attempts. 7. Isolate critical web applications in segmented network zones to limit lateral movement if compromise occurs. 8. Educate development and operations teams about the vulnerability and secure coding practices to prevent similar issues. 9. Consider temporary disabling or restricting template file upload and editing features until patches are applied. 10. Prepare incident response plans specific to web application compromises involving ThinkPHP.