CVE-2023-26255 in STAGIL Navigation Themes Plugin
Summary
by MITRE • 02/28/2023
An unauthenticated path traversal vulnerability affects the "STAGIL Navigation for Jira - Menu & Themes" plugin before 2.0.52 for Jira. By modifying the fileName parameter to the snjCustomDesignConfig endpoint, it is possible to traverse and read the file system.
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Analysis
by VulDB Data Team • 03/26/2023
The vulnerability identified as CVE-2023-26255 represents a critical path traversal flaw within the STAGIL Navigation for Jira plugin, specifically affecting versions prior to 2.0.52. This issue manifests through the snjCustomDesignConfig endpoint which fails to properly validate or sanitize user input parameters, particularly the fileName parameter that controls file access operations. The vulnerability allows attackers to manipulate the fileName parameter to navigate beyond the intended file system boundaries and access arbitrary files on the server hosting the Jira instance.
This unauthenticated path traversal vulnerability falls under the Common Weakness Enumeration category CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. The flaw enables attackers to bypass normal access controls and potentially read sensitive files including configuration data, source code, database credentials, or other system files that should remain protected. The vulnerability is particularly dangerous because it requires no authentication, making it accessible to any attacker who can reach the Jira instance and its exposed endpoints.
The operational impact of this vulnerability extends beyond simple file reading capabilities, as it can lead to complete system compromise when combined with other attack vectors. An attacker could potentially access Jira's configuration files, application logs, or even sensitive data stored within the application's file system. The vulnerability affects the core functionality of the plugin by allowing unauthorized access to the underlying file system, which could expose not only the Jira instance but also the broader server environment. This type of vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing) when attackers use the information gained to further compromise systems.
Mitigation strategies for CVE-2023-26255 primarily focus on immediate patching of the affected plugin to version 2.0.52 or later, which includes proper input validation and sanitization measures. Organizations should also implement network-level restrictions to limit access to the snjCustomDesignConfig endpoint and other potentially vulnerable plugin endpoints. Additional defensive measures include implementing proper access controls, monitoring for unusual file access patterns, and conducting regular security assessments of third-party plugins. The vulnerability demonstrates the importance of validating all user inputs and implementing proper access controls even for internal plugin endpoints, as highlighted by security frameworks such as the OWASP Top Ten and NIST cybersecurity guidelines. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts targeting similar path traversal vulnerabilities.