As of now, there are no known public exploits associated with this vulnerability, and it is not included in the Known Exploited Vulnerabilities (KEV) database. However, organizations should remain vigilant and monitor for any future developments.
Vulnerability Details
The official CVE description states that the vulnerability results from Mattermost failing to restrict channel export for archived channels when the related permission is disabled. The impact of this oversight could allow unauthorized users to access and export sensitive channel content.The CVSS score of 4.3 represents a medium severity level, indicating that while the vulnerability is not critical, it still poses a notable risk. The vulnerability affects the Mattermost server, specifically versions 10.1.3, 10.4.1, 9.11.7, 10.3.2, and 10.2.2 and is classified as CWE-863, which highlights issues with improper authorization.This vulnerability was published on February 24, 2025, and has been analyzed for its potential impact on users.
Technical Analysis
The root cause of this vulnerability stems from insufficient access controls implemented within the Mattermost server. Specifically, the mechanism that should restrict access to exported channel contents fails when the permission to view archived channels is turned off.The attack vector for this vulnerability is considered to be network-based, with a low complexity for exploitation. Attackers do not require high privileges or user interaction, making it easier for unauthorized users to exploit this flaw.The confidentiality impact is rated as low, indicating that while sensitive information may be exposed, it does not compromise the integrity or availability of the system.
Risk & Impact Analysis
The real-world risk posed by CVE-2025-24526 is significant, particularly for organizations that rely on Mattermost for internal communications. Failure to mitigate this vulnerability could lead to unauthorized access to sensitive channel discussions, potentially damaging trust and compliance obligations.With the potential for sensitive data exposure, organizations should assess the blast radius of this vulnerability and prioritize it in their patch management cycles. The urgency assessment, given the CVSS score of 4.3, suggests that organizations should address this issue in their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions of Mattermost include 10.1.x through 10.1.3, 10.4.x through 10.4.1, 9.11.x through 9.11.7, 10.3.x through 10.3.2, and 10.2.x through 10.2.2. Organizations using Mattermost should ensure they are running versions above these specified ranges.
Mitigation & Remediation
Organizations should update to the latest versions of Mattermost to mitigate the risks associated with CVE-2025-24526. The recommended action is to upgrade to versions beyond the affected ranges to ensure proper restriction of channel exports.In addition to patching, organizations should review their access control policies and consider implementing network controls to further restrict unauthorized access to sensitive data. Continuous security testing should also be conducted to validate the effectiveness of the remediation.Continuous penetration testing can help identify any weaknesses that remain post remediation.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor for unusual log entries related to channel exports and access to archived channels. Behavioral anomalies indicating unauthorized data access should also be flagged for review.Monitoring network traffic for requests attempting to access exported channel contents can provide additional insights into potential exploitation attempts.
AppSecure Threat Intelligence Insight
CVE-2025-24526 highlights the importance of robust access controls within software applications. Organizations must recognize the potential for unauthorized access and ensure that their security policies are comprehensive.This vulnerability represents a trend of insufficient permissions management that can lead to serious data breaches. Security teams should be proactive in evaluating their systems to mitigate similar risks.For additional insights on vulnerability management, organizations can refer to our resources on vulnerability management programs and penetration testing methodologies for better security postures.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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