CVE-2019-20804 in Gila
Summary
by MITRE
Gila CMS before 1.11.6 allows CSRF with resultant XSS via the admin/themes URI, leading to compromise of the admin account.
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Analysis
by VulDB Data Team • 05/05/2025
The vulnerability identified as CVE-2019-20804 affects Gila CMS versions prior to 1.11.6 and represents a critical security flaw that combines cross-site request forgery with cross-site scripting vulnerabilities. This issue arises through the admin/themes URI endpoint, creating a dangerous attack vector that can lead to complete administrative account compromise. The flaw demonstrates how seemingly isolated vulnerabilities can compound to create severe security risks in content management systems.
The technical implementation of this vulnerability stems from insufficient input validation and missing anti-CSRF tokens within the admin themes management interface. When an authenticated administrator visits a maliciously crafted page, the application fails to properly verify the authenticity of the request origin, allowing attackers to forge requests that modify theme settings or configurations. This CSRF weakness becomes particularly dangerous when combined with XSS capabilities, as the attacker can inject malicious scripts that execute within the administrator's browser context. The vulnerability specifically targets the admin/themes URI which serves as a critical administrative interface for managing website appearance and functionality.
The operational impact of CVE-2019-20804 extends far beyond simple data theft or modification. Once an attacker successfully compromises an administrator account through this vulnerability, they gain complete control over the website's content management system, including the ability to modify or delete content, alter user permissions, install malicious plugins, and potentially use the compromised system as a launching point for further attacks within the network. The attack chain typically involves tricking an administrator into visiting a malicious website while authenticated to the vulnerable Gila CMS instance, where the attacker's payload executes and establishes persistence. This vulnerability aligns with CWE-352, which specifically addresses cross-site request forgery issues, and also relates to CWE-79 for cross-site scripting vulnerabilities.
Security professionals should implement immediate mitigations including updating to Gila CMS version 1.11.6 or later, which includes proper CSRF token validation and input sanitization measures. Network administrators should also consider implementing additional security controls such as web application firewalls that can detect and block suspicious request patterns targeting administrative interfaces. The vulnerability demonstrates the importance of comprehensive security testing, particularly for administrative endpoints that handle user data and system configuration changes. Organizations should conduct thorough security assessments of their CMS installations and ensure proper input validation, output encoding, and session management practices are in place to prevent similar vulnerabilities from being exploited in the future.
This vulnerability classification aligns with ATT&CK technique T1078 which covers valid accounts and T1566 which addresses credential harvesting through social engineering. The attack pattern typically follows a successful phishing campaign or social engineering attempt where administrators are tricked into visiting malicious sites, followed by exploitation of the CSRF/XSS vulnerability to gain elevated privileges and establish persistent access to the compromised system. The remediation process should include not only patching the software but also implementing security awareness training for administrators to recognize potential social engineering attempts that could lead to exploitation of such vulnerabilities.