CVE-2022-2820 in nameless
Summary
by MITRE • 08/15/2022
Session Fixation in GitHub repository namelessmc/nameless prior to v2.0.2.
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Analysis
by VulDB Data Team • 02/25/2026
The vulnerability identified as CVE-2022-2820 represents a session fixation issue discovered in the NamelessMC web application prior to version 2.0.2. This security flaw affects the authentication mechanism within the open source Minecraft community platform that many server administrators use to manage their online communities. The vulnerability stems from the application's improper handling of session management during the login process, creating opportunities for attackers to exploit the system's session handling mechanisms.
Session fixation vulnerabilities occur when an application fails to invalidate or regenerate session identifiers upon successful authentication, allowing an attacker to maintain a valid session across different user contexts. In the case of the NamelessMC application, this flaw permitted malicious actors to establish a session with a known session identifier before a user authenticated, then potentially hijack that session once legitimate authentication occurred. The vulnerability resides in the application's session management logic where session tokens were not properly rotated or invalidated during the authentication flow, creating a persistent attack vector that could be exploited by unauthorized parties.
The operational impact of this vulnerability extends beyond simple session hijacking, as it could potentially allow attackers to gain unauthorized access to administrative accounts or user sessions within the NamelessMC platform. This creates a significant risk for Minecraft server administrators who rely on the application for community management, as compromised sessions could lead to unauthorized modifications of forum content, user data manipulation, or complete administrative control over the community platform. The vulnerability affects all versions prior to 2.0.2, meaning that organizations running older versions of NamelessMC were exposed to potential session fixation attacks throughout the affected release cycle.
The technical implementation of this vulnerability aligns with CWE-384, which specifically addresses session fixation issues in web applications where session identifiers are not properly regenerated upon authentication. This flaw typically falls under the ATT&CK technique T1563.002, which covers credentials from password managers and session management attacks that leverage session tokens. The vulnerability demonstrates poor secure coding practices in session management, where the application failed to implement proper session regeneration upon successful authentication, a fundamental security control recommended by OWASP and other security frameworks. Organizations should prioritize updating to version 2.0.2 or later, which includes proper session management fixes that invalidate old session identifiers and generate new secure tokens upon successful user authentication, effectively mitigating this session fixation vulnerability.
This vulnerability highlights the critical importance of proper session management in web applications, particularly those handling user authentication and community data. The flaw represents a failure to implement the principle of least privilege and proper session lifecycle management, where session tokens should be regenerated upon authentication to prevent attackers from maintaining persistent access. Security practitioners should implement regular security assessments of web applications to identify similar session management vulnerabilities, as session fixation attacks remain a prevalent threat vector in web application security. The fix implemented in version 2.0.2 demonstrates the standard remediation approach of session token regeneration upon authentication, which aligns with security best practices established in the OWASP Top Ten and NIST cybersecurity frameworks for preventing session-related security issues.