CVE-2021-44263 in TestRail
Summary
by MITRE • 12/20/2021
Gurock TestRail before 7.2.4 mishandles HTML escaping.
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Analysis
by VulDB Data Team • 12/24/2021
The vulnerability identified as CVE-2021-44263 affects Gurock TestRail versions prior to 7.2.4 and represents a critical HTML escaping mishandling issue that exposes the system to potential cross-site scripting attacks. This flaw resides in the application's processing of user-supplied input within HTML contexts, where insufficient sanitization allows malicious code to persist and execute within the browser environment of other users. The vulnerability specifically impacts how the platform handles HTML content rendering, creating an environment where attackers can inject malicious scripts that execute in the context of other users' sessions.
The technical nature of this vulnerability aligns with CWE-79, which describes Cross-Site Scripting (XSS) flaws occurring when application developers fail to properly escape or sanitize user input before rendering it in HTML contexts. The flaw manifests when TestRail processes user-generated content such as test case descriptions, comments, or other editable fields that may contain HTML markup. Without proper HTML escaping mechanisms, malicious actors can embed script tags or other malicious HTML elements that execute when other users view the affected content. This creates a persistent threat vector where attackers can establish footholds within the application environment and potentially escalate privileges or access sensitive data.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform session hijacking, data exfiltration, and privilege escalation attacks. When users view compromised content, their browsers execute the embedded scripts with the privileges of their current session, potentially allowing attackers to steal authentication tokens, modify test results, or access confidential project information. The vulnerability affects all users within the TestRail environment who encounter the maliciously crafted content, making it particularly dangerous in collaborative testing environments where multiple team members interact with shared test data. The persistence of the vulnerability means that once injected, malicious content remains active until manually removed or the system is updated.
Mitigation strategies for CVE-2021-44263 require immediate patching to Gurock TestRail version 7.2.4 or later, which implements proper HTML escaping mechanisms and input sanitization. Organizations should also implement additional defensive measures including content security policy enforcement, regular security scanning of user-generated content, and user education regarding the dangers of viewing untrusted content within collaborative platforms. The vulnerability demonstrates the critical importance of input validation and output encoding in web applications, aligning with ATT&CK technique T1059.007 for command and scripting interpreter execution through web shells or malicious scripts. Security teams should conduct comprehensive vulnerability assessments of their TestRail installations and monitor for any signs of exploitation attempts, while also implementing network-based intrusion detection systems to identify potential malicious script injection activities.