CVE-2018-10228 in LimeSurvey
Summary
by MITRE • 12/14/2021
Cross-site scripting (XSS) vulnerability in /application/controller/admin/theme.php in LimeSurvey 3.6.2+180406 allows remote attackers to inject arbitrary web script or HTML via the changes_cp parameter to the index.php/admin/themes/sa/templatesavechanges URI.
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Analysis
by VulDB Data Team • 12/17/2021
The vulnerability CVE-2018-10228 represents a critical cross-site scripting flaw discovered in LimeSurvey version 3.6.2 and later, specifically within the administrative theme management component. This vulnerability resides in the theme.php controller file and exposes the application to remote code execution through malicious script injection. The flaw manifests when the application fails to properly sanitize user input passed through the changes_cp parameter in the URL path index.php/admin/themes/sa/templatesavechanges, creating an exploitable entry point for attackers to execute arbitrary web scripts or HTML content within the context of authenticated admin sessions.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the LimeSurvey administrative interface. When administrators navigate to the theme management section and attempt to save template changes, the application processes the changes_cp parameter without sufficient sanitization, allowing malicious payloads to persist in the application's database or configuration files. This weakness directly maps to CWE-79, which defines Cross-Site Scripting vulnerabilities as the improper handling of untrusted data in web applications. The vulnerability affects the application's security model by undermining the principle of least privilege, as authenticated administrators become potential vectors for XSS attacks that can compromise the entire administrative environment.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to execute malicious code within the context of administrator sessions. This enables attackers to perform actions such as modifying survey configurations, accessing sensitive data, creating new administrative accounts, or even escalating privileges to gain full system control. The vulnerability is particularly dangerous in environments where LimeSurvey is used for critical data collection, as it can lead to data breaches, survey manipulation, or complete system compromise. According to ATT&CK framework, this vulnerability aligns with T1059.007 for Scripting and T1566.001 for Phishing, as attackers can leverage the XSS to deliver malicious payloads and establish persistent access through compromised administrator sessions.
Mitigation strategies for CVE-2018-10228 require immediate implementation of multiple defensive measures including input validation, output encoding, and access controls. Organizations should apply the official security patch released by LimeSurvey developers, which addresses the insufficient sanitization of the changes_cp parameter. Additionally, implementing proper Content Security Policy headers can prevent execution of unauthorized scripts even if the vulnerability is exploited. Web Application Firewalls should be configured to monitor and block suspicious parameter values in the affected URI path, while regular security audits should verify that all user inputs are properly escaped before being processed. The remediation process must also include comprehensive testing to ensure that the fix does not introduce regressions in legitimate theme management functionality, and that all administrator sessions are properly authenticated and authorized before allowing access to sensitive administrative functions.