CVE-2024-4399 Scanner

The CAS WordPress theme is a popular theme designed for creating visually appealing and responsive WordPress-based websites. It is frequently employed by bloggers, creative professionals, small businesses, and online portfolios to present content attractively. CAS offers user-friendly customization options and emphasizes a minimalist and modern design aesthetic. The theme simplifies site creation, allowing users to efficiently manage and publish their content. Its intuitive backend interface provides easy control of website design and layout settings. Due to its simplicity and attractive user interface, CAS remains favored among individuals and businesses looking for a reliable and stylish WordPress theme.

The CAS theme suffers from a critical Server-Side Request Forgery (SSRF) vulnerability, present in versions up to and including 1.0.0. The flaw is due to improper validation and sanitization of the 'url' parameter within the 'get_remote_data.php' script. Attackers can exploit this vulnerability remotely without requiring authentication, forcing the server to initiate requests to arbitrary external or internal URLs. By exploiting the SSRF vulnerability, attackers may access sensitive internal resources not typically exposed externally. The vulnerability significantly endangers internal infrastructure as attackers could leverage it to scan and attack internal network resources. Prompt mitigation is necessary due to the severity and ease of exploitation.

The vulnerability specifically involves the 'get_remote_data.php' script within the CAS theme directory, which improperly handles the user-supplied 'url' parameter. Attackers can trigger unauthorized server-side HTTP requests by crafting maliciously formed requests containing arbitrary external or internal URLs. The vulnerable endpoint, accessible at '/wp-content/themes/cas/get_remote_data.php', fails to verify whether incoming requests are legitimate, allowing attackers to induce requests to arbitrary destinations. This lack of proper input validation enables attackers to initiate connections to internal systems typically unreachable from the public internet. The flaw can be exploited remotely without authentication, greatly expanding the attack surface. Correct input validation and sanitization procedures are essential to prevent exploitation.

If exploited, the SSRF vulnerability can lead to serious consequences including unauthorized access to internal networks, sensitive information disclosure, and internal service enumeration. Attackers could scan internal networks for vulnerabilities, potentially exploiting additional systems behind firewalls. Sensitive internal information such as credentials, internal IP addresses, or configuration details may be exposed, providing attackers further footholds for intrusion. Such vulnerabilities could be combined with other exploits to enable lateral movement and deeper network penetration. Overall, successful exploitation would significantly compromise both website and internal network security.

REFERENCES

• https://wpscan.com/vulnerability/c0136057-f420-4fe7-a147-ecbec7e7a9b5
• https://nvd.nist.gov/vuln/detail/CVE-2024-4399