CVE-2025-20036 affects Mattermost Mobile Apps versions up to and including 2.22.0. This vulnerability allows a malicious authenticated user to craft a post that causes the application to crash. With a CVSS score of 6.5, it is classified as a medium severity issue, indicating a significant risk that organizations should address.
The vulnerability arises from improper validation of post properties, which can be exploited without requiring high privileges or user interaction. This means that an attacker could leverage this flaw merely by being an authenticated user, making it crucial for organizations to evaluate their user access policies.
Risk to organizations includes potential application downtime and negative user experience due to crashes. Given the nature of the issue, organizations should schedule immediate remediation to mitigate these risks.
Currently, there are no known exploits in the wild, but the exploitability score of 2.8 indicates that the potential for exploitation exists. Organizations must remain vigilant and monitor updates regarding this vulnerability.
Vulnerability Details
The official description states that Mattermost Mobile Apps versions <=2.22.0 fail to properly validate post properties, allowing a malicious authenticated user to induce a crash via a malicious post. The vulnerability is classified under CWE-1287.
The CVSS score of 6.5 (medium severity) indicates low attack complexity and low privileges required, with the potential for high availability impact, as the application could become unresponsive.
Technical Analysis
The root cause of this vulnerability is the failure to validate post properties appropriately. Attackers can exploit this flaw over the network, taking advantage of low complexity and requiring only low privileges.
The attack vector is network-based, indicating that the malicious post can be sent from any authenticated user on the network. The attack complexity is low, meaning that the exploitation does not require sophisticated techniques.
Since user interaction is not required, the vulnerability poses a serious risk as it can be exploited without any action from the targeted user. The impact on availability is high, as the application may crash and become unusable.
Risk & Impact Analysis
The real-world deployment risk of this vulnerability is substantial. Organizations using affected versions of the Mattermost Mobile Apps are at risk of experiencing application crashes, which can lead to significant downtime.
Moreover, the blast radius could be extensive, especially in environments where Mattermost is used for critical communications. The urgency for remediation is reflected in the CVSS score and the fact that it is not currently listed in the Known Exploited Vulnerabilities (KEV) catalog.
Organizations should prioritize patching immediately, as failure to do so could lead to operational disruptions and affect user trust.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions include Mattermost Mobile Apps versions <=2.22.0. Organizations should note that all versions prior to the vendor patch are vulnerable.
Mitigation & Remediation
Organizations should update Mattermost Mobile Apps to version 2.23.0 or later to remediate this vulnerability. If immediate patching is not possible, consider implementing network controls to restrict access to the application.
Additionally, organizations should engage in penetration testing to identify any similar weaknesses and ensure that their environment is secure.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual post activities and application crashes. Additionally, monitoring network traffic for unusual patterns may provide insights into attempted exploits.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-20036 lies in its demonstration of the necessity for robust input validation in mobile applications. As mobile platforms become increasingly targeted, security teams must prioritize identifying and remediating vulnerabilities before they can be exploited.
This vulnerability also emphasizes the importance of continuous security assessments and the implementation of best practices in application development. Organizations are encouraged to adopt vulnerability management programs to proactively address potential risks.
Organizations should also consider the significance of engaging in penetration testing methodologies that encompass mobile applications to safeguard against similar vulnerabilities in the future.
In conclusion, CVE-2025-20036 serves as a reminder of the evolving threat landscape and the necessity for organizations to remain vigilant and proactive in their security efforts.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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