What’s Vulnerable › Vulnerabilities
CVE-2019-20869
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.8% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-06-19 · updated 2026-06-17
Description
An issue was discovered in Mattermost Server before 5.10.0, 5.9.1, 5.8.2, and 4.10.9. A non-member could change the Update/Patch Channel endpoint for a private channel.
Affected products
- Mattermost: before 4.10.9; from 5.7.0 before 5.7.3; from 5.8.0 before 5.8.2; from 5.9.0 before 5.9.1; 5.10.0-rc1, 5.10.0-rc2, 5.10.0-rc3, 5.10.0-rc4, 5.10.0-rc5, 5.10.0-rc6 — fixed in 4.10.9, 5.7.3, 5.8.2, 5.9.1
How to fix
Upgrade to a fixed version: Mattermost 4.10.9, 5.7.3, 5.8.2, 5.9.1. Check the vendor advisory for mitigations.
References
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