Executive Summary

CVE-2025-14731 is a Server-Side Template Injection (SSTI) vulnerability in the CTCMS Content Management System version 2.1.2, specifically in the template parsing mechanism located in the file /ctcms/apps/libraries/CT_Parser.php. The vulnerability arises because the system improperly sanitizes or neutralizes special template syntax elements, such as {if:...}...{end if}, allowing attackers to inject malicious template code. This injected code can include PHP functions like eval(), which are executed by the server when the template is rendered. The vulnerability can be exploited remotely by unauthenticated or low-privileged users, for example, by posting specially crafted content in the community/forum section or by an authenticated administrator editing template files. This leads to remote code execution on the server. [1, 3, 4, 5]

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Impact Analysis

This vulnerability allows attackers to execute arbitrary PHP code remotely on the affected server. This can lead to full compromise of the system, including unauthorized access, data theft, modification or deletion of data, disruption of service, and potentially using the compromised server as a foothold for further attacks. Because the exploit can be triggered remotely and by unauthenticated or low-privileged users, it poses a significant security risk to the confidentiality, integrity, and availability of the system. [1, 2, 3, 4, 5]

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Detection Guidance

This vulnerability can be detected by searching for signs of Server-Side Template Injection (SSTI) or remote code execution attempts in the CTCMS system, particularly in the frontend community/forum posts or backend template files. One detection method is to look for suspicious template syntax such as `{if:...}...{end if}` containing PHP functions like `eval()`. Additionally, Google dorking can be used to identify vulnerable targets by searching for URLs containing `inurl:ctcms/apps/libraries/CT_Parser.php`. On the system, monitoring web server logs for POST requests with suspicious parameters (e.g., parameters named '1' containing PHP code) targeting community/forum posts or template rendering endpoints can help detect exploitation attempts. Example commands include: 1. Using grep to find suspicious template syntax in template files: `grep -r "{if:" /path/to/ctcms/templates/` 2. Searching web server logs for suspicious POST requests: `grep -i "POST" /var/log/apache2/access.log | grep -E "\{if:|eval\("` 3. Using Google dorking to find potentially vulnerable instances: `site:example.com inurl:ctcms/apps/libraries/CT_Parser.php` These methods help identify attempts to exploit the vulnerability or presence of malicious template code. [2]

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Mitigation Strategies

Immediate mitigation steps include replacing or upgrading the affected CTCMS component or product to a version that is not vulnerable, as no official patches or fixes are currently published. Restrict access to the template management functionality, especially limiting administrator access to trusted users only. Monitor and sanitize user inputs in the community/forum sections to prevent injection of malicious template syntax. If possible, disable or restrict the use of template syntax processing in user-submitted content. Additionally, monitor logs for exploitation attempts and consider implementing web application firewall (WAF) rules to block suspicious payloads containing template syntax or PHP code injections. Since no known mitigations or countermeasures have been published, the safest approach is to avoid using the vulnerable version and restrict access to vulnerable components. [2]

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Compliance Impact

The provided resources do not contain information regarding the impact of CVE-2025-14731 on compliance with common standards and regulations such as GDPR or HIPAA.

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