CVE-2025-0476 is a medium-severity vulnerability affecting Mattermost Mobile Apps versions <=2.22.0. This vulnerability allows an attacker to crash the mobile app for any user who opens a channel containing specially crafted attachment names. The CVSS score for this vulnerability is 4.3, indicating a moderate level of risk to organizations. Failure to address this issue can lead to significant disruptions in user experience, especially in environments where the Mattermost application is heavily relied upon for communication.
Organizations should prioritize remediation, given that this flaw can be exploited remotely with low complexity and requires minimal privileges. The potential impact on availability is low, but it can significantly affect users' ability to utilize the application effectively. The urgency for defenders to patch this vulnerability is high, as it directly affects user experience and application reliability.
As of now, there are no publicly known exploits or proof-of-concept code available for this vulnerability. However, organizations should remain vigilant and prepare for potential future exploitation. Regular monitoring and timely updates are crucial to maintaining security posture.
Organizations should also consider implementing additional security measures, such as user education about the risks associated with untrusted attachments and channels. Ensuring a robust incident response plan is in place will help mitigate any risks associated with this vulnerability.
In summary, while the immediate risk of exploitation is low, the potential impact on user experience makes prompt action necessary. Organizations using Mattermost Mobile Apps should address this vulnerability as a part of their regular patch management cycle.
Vulnerability Details
The Mattermost Mobile Apps versions <=2.22.0 are affected due to improper handling of specially crafted attachment names. The vulnerability is classified under CWE-1287. The CVSS 3.1 score is 4.3, reflecting a medium severity level. The vulnerability was published on January 16, 2025.
Technical Analysis
The root cause of CVE-2025-0476 stems from how the Mattermost Mobile Apps fail to validate attachment names effectively. The attack vector is network-based, where an attacker could send a specially crafted message containing an attachment name to a user in a channel. The attack complexity is low, requiring only basic privileges to execute.
There is no required user interaction, making this vulnerability particularly concerning. The impact on confidentiality and integrity is none, while the availability impact is low, as it primarily leads to application crashes without compromising user data.
Risk & Impact Analysis
The risk to organizations includes potential disruptions in communication and workflow due to application crashes triggered by malicious attachments. While the immediate exploitation risk is low, the availability impact can still disrupt business operations. Organizations relying on Mattermost for critical communications should consider this vulnerability a priority and address it promptly.
Given the low EPS score of 0.003, indicating a minimal likelihood of exploitation, organizations should still not overlook this vulnerability. The urgency for patching is assessed as high, especially in environments with significant user engagement with the Mattermost application.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Mattermost Mobile Apps prior to 2.23.0 are affected by this vulnerability. Organizations should ensure that they update to the latest version to mitigate this risk.
Mitigation & Remediation
Organizations should prioritize applying the latest patches to Mattermost Mobile Apps to remediate this vulnerability. For those unable to immediately apply the updates, consider implementing strict controls over attachments in channels, potentially restricting the types of files that can be shared until the update is applied.
Additionally, organizations may benefit from conducting a thorough security assessment of their Mattermost implementation, which can be further enhanced by utilizing penetration testing to identify any other potential vulnerabilities.
Detection Guidance
To detect this vulnerability, organizations should monitor logs for unusual activity related to attachment handling within Mattermost channels. Behavioral anomalies, such as unexpected crashes or performance issues when users interact with specific channels, may indicate exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-0476 lies in the importance of secure coding practices to prevent similar vulnerabilities in future releases. This incident highlights the need for robust validation mechanisms when handling user-generated content, especially in communication applications.
Organizations should learn from this vulnerability and ensure that their development teams are equipped with the necessary training and resources to implement secure coding practices. Regular security assessments, such as engaging in application security assessments, can help identify and remediate vulnerabilities proactively.
This incident also serves as a reminder of the importance of maintaining awareness of security vulnerabilities in third-party applications. Organizations should actively monitor their software supply chain and engage in red teaming services to simulate real-world attacks and uncover potential weaknesses.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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