What’s Vulnerable › Vulnerabilities
CVE-2018-21250
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-06-19 · updated 2026-06-17
- Weakness: CWE-400
Description
An issue was discovered in Mattermost Server before 5.2.2, 5.1.2, and 4.10.4. It allows remote attackers to cause a denial of service (memory consumption) via crafted image dimensions.
Affected products
- Mattermost: before 4.10.4; from 5.1.0 before 5.1.2; from 5.2.0 before 5.2.2 — fixed in 4.10.4, 5.1.2, 5.2.2
How to fix
Upgrade to a fixed version: Mattermost 4.10.4, 5.1.2, 5.2.2. Check the vendor advisory for mitigations.
References
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