CVE-2024-58279 is an authenticated remote code execution vulnerability affecting appRain CMF version 4.0.5. The flaw arises from an unrestricted file upload vulnerability (CWE-434) in the filemanager upload endpoint, which fails to properly validate or restrict the types of files that administrative users can upload. Specifically, malicious PHP files can be uploaded and stored in the web-accessible uploads directory. Once uploaded, these PHP files can act as web shells, allowing attackers to execute arbitrary commands on the server with the privileges of the web application. The vulnerability requires an attacker to have administrative credentials, but no additional user interaction is needed. The CVSS 4.0 base score is 8.6, reflecting the network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability does not currently have publicly available patches or known exploits in the wild, but the risk remains significant due to the potential for full system compromise. Organizations using appRain CMF 4.0.5 should assess their exposure and implement controls to prevent exploitation.

For European organizations, exploitation of CVE-2024-58279 could lead to complete system compromise, data breaches, and disruption of services. Attackers gaining remote code execution can steal sensitive data, modify or delete critical information, and use the compromised server as a foothold for lateral movement within the network. This is particularly concerning for sectors handling sensitive personal data under GDPR, such as healthcare, finance, and government agencies. The ability to deploy web shells also facilitates persistent access and further attacks, increasing the risk of ransomware or espionage campaigns. The vulnerability’s requirement for administrative access limits exposure to insider threats or attackers who have already compromised credentials, but it remains a critical risk if credential theft or phishing occurs. The lack of known exploits in the wild suggests a window for proactive defense, but organizations should not delay remediation.

1. Immediately upgrade appRain CMF to a version that addresses this vulnerability once available. If no patch exists, consider disabling or restricting the filemanager upload endpoint to trusted users only. 2. Implement strict access controls and multi-factor authentication for all administrative accounts to reduce the risk of credential compromise. 3. Employ web application firewalls (WAFs) with rules to detect and block suspicious file uploads, especially PHP files in upload directories. 4. Conduct regular audits of uploaded files and monitor web server directories for unauthorized or unexpected PHP files. 5. Use file integrity monitoring solutions to detect changes in web-accessible directories. 6. Restrict execution permissions on upload directories to prevent execution of uploaded scripts where possible. 7. Educate administrators on phishing and credential security to prevent unauthorized access. 8. Monitor logs for unusual activity indicative of exploitation attempts or web shell usage.