CVE-2019-20869

5.3 mediumEPSS 0.8%

Medium (5.3) in mattermost mattermost server. EPSS 0.8% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
Published: 2020-06-19
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mattermost:mattermost_server

References

https://mattermost.com/security-updates/
https://mattermost.com/security-updates/

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