CVE-2023-2281 is a low-severity vulnerability affecting Mattermost, specifically the Mattermost Server. This vulnerability allows clients to see sensitive information about archived teams, including names, display names, and descriptions. This data exposure occurs due to inadequate sanitization of Websocket events sent to connected clients during the archiving process.
The vulnerability has a CVSS score of 3.1, classified as low severity, indicating that while the risk is present, it may not pose an immediate threat. However, organizations should recognize the potential for information leakage and the implications it may have on user privacy and data security.
Currently, there is no known public exploit for this vulnerability, but it is essential for organizations utilizing Mattermost to remain vigilant and proactive in applying patches as part of their cybersecurity strategy.
Organizations should prioritize patching immediately.
Vulnerability Details
The official description states: 'When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently connected clients. This allows the clients to see the name, display name, description, and other data about the archived team.'
The vulnerability is classified under CWE-200, which pertains to Information Exposure. The attack vector is network-based, with a high attack complexity, requiring low privileges and no user interaction.
The vulnerability affects all versions of the Mattermost Server prior to version 7.9.0.
Technical Analysis
The root cause of this issue lies in the failure to sanitize Websocket events. When a team is archived, the system transmits various attributes of that team to connected clients without proper validation or sanitization. This oversight can lead to unauthorized access to sensitive information, creating a potential risk for organizations.
This vulnerability has a high attack complexity. Attackers would need to be connected to the Websocket endpoint to exploit the vulnerability, which may limit the exploitability in certain deployment scenarios.
Risk & Impact Analysis
Risk to organizations includes exposure of sensitive data about archived teams, which could lead to privacy concerns and potential reputational damage. While the CVSS score indicates a low severity, the implications of the exposed data should not be underestimated, especially in environments where sensitive team information is handled.
Organizations should assess the potential blast radius of this vulnerability in their environment and prioritize remediation efforts accordingly. Immediate patching is advised to mitigate risks associated with data exposure.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of the Mattermost Server prior to version 7.9.0.
Mitigation & Remediation
Organizations are advised to update to Mattermost Server version 7.9.0 or later to mitigate this vulnerability. If immediate patching is not feasible, consider implementing Websocket traffic monitoring and access controls to limit exposure.
Detection Guidance
Monitor logs for any unauthorized access attempts and review Websocket events for unrecognized team archive notifications.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in the potential for information exposure in collaborative environments. Organizations should consider implementing robust security testing practices, such as penetration testing, to identify similar weaknesses in their systems.
Maintaining awareness of vulnerabilities and patch management is crucial in preventing data exposure incidents. Security teams should look for patterns in vulnerabilities such as this to enhance their defenses.
For further guidance on security practices, reference the penetration testing methodology for comprehensive strategies.
Lastly, organizations should also consider adopting a vulnerability management program to systematically address security risks.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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