CVE-2012-4901 in Template CMS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Template CMS 2.1.1 and earlier allows remote attackers to inject arbitrary web script or HTML via the themes_editor parameter an add_template action to admin/index.php.
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Analysis
by VulDB Data Team • 05/03/2025
The vulnerability identified as CVE-2012-4901 represents a critical cross-site scripting flaw within Template CMS version 2.1.1 and earlier systems. This security weakness exists in the administrative interface of the content management system, specifically in how the application processes user input through the themes_editor parameter during add_template actions. The flaw allows malicious actors to execute arbitrary web scripts or HTML code within the context of a victim's browser session, potentially compromising user data and system integrity.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the admin/index.php file. When administrators or authenticated users interact with the template editing functionality, the system fails to properly sanitize the themes_editor parameter before incorporating it into dynamic web content. This absence of proper sanitization creates an environment where attacker-controlled data can be seamlessly integrated into the application's response, enabling malicious script execution. The vulnerability operates under CWE-79 which specifically addresses cross-site scripting flaws in web applications, making it a classic example of improper input handling leading to code injection.
The operational impact of this vulnerability extends beyond simple script execution, as it can facilitate more sophisticated attacks within the context of a compromised user session. Attackers can leverage this flaw to steal session cookies, redirect users to malicious sites, deface web pages, or even escalate privileges within the CMS environment. The remote exploitation capability means that attackers do not require physical access to the system or direct network connectivity to the server itself. This vulnerability particularly affects authenticated users with administrative privileges, as the attack vector targets the administrative interface where sensitive operations occur. According to ATT&CK framework, this vulnerability aligns with T1059.007 for scripting and T1566 for spearphishing with attachments, as it enables the execution of malicious code through web-based vectors.
Mitigation strategies for CVE-2012-4901 should prioritize immediate patching of the Template CMS to version 2.1.2 or later, which contains the necessary fixes for input validation. Organizations should implement comprehensive input sanitization measures, including the use of parameterized queries and proper HTML escaping techniques before rendering user-supplied content. Additionally, network segmentation and access controls should limit administrative access to only authorized personnel, reducing the attack surface for potential exploitation. Security monitoring should include detection of unusual administrative activities and abnormal parameter patterns in web application logs. The implementation of Content Security Policy headers can provide an additional layer of protection by restricting the sources from which scripts can be executed, thereby mitigating the impact of successful XSS attempts. Regular security audits and vulnerability assessments should be conducted to identify similar input validation weaknesses in other components of the web application stack.