CVE-2023-2831
MEDIUMCVSS 6.5/10EPSS 0.68%
Last modified
CVE-2023-2831 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Mattermost fails to unescape Markdown strings in a memory-efficient way, allowing an attacker to cause a Denial of Service by sending a message containing a large number of escaped characters. . EPSS estimates a 0.68% chance of exploitation in the next 30 days.
Description
Mattermost fails to unescape Markdown strings in a memory-efficient way, allowing an attacker to cause a Denial of Service by sending a message containing a large number of escaped characters.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | >= 7.1.0, <= 7.1.9 |
| Mattermost | Mattermost | >= 7.8.0, <= 7.8.4 |
| Mattermost | Mattermost | >= 7.9.0, <= 7.9.3 |
| Mattermost | Mattermost | 7.10.0 |
References
- https://mattermost.com/security-updates/Vendor Advisory
- https://mattermost.com/security-updates/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-2831?
Mattermost fails to unescape Markdown strings in a memory-efficient way, allowing an attacker to cause a Denial of Service by sending a message containing a large number of escaped characters.
How severe is CVE-2023-2831?
CVE-2023-2831 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.
How do I fix CVE-2023-2831?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-2831?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST