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High severity7.5NVD Advisory· Published Jun 19, 2020· Updated Jun 17, 2026

CVE-2019-20859

CVE-2019-20859

Description

An issue was discovered in Mattermost Server before 5.15.0. Login access control can be bypassed via crafted input.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

7

Mattermost/Serverdescription
Mattermost/Mattermostllm-fuzzy6 versions
<5.15.0+ 5 more
- (no CPE)range: <5.15.0
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: <4.10.8
- cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc4:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

1

mattermost.com/security-updates/nvdVendor Advisory

News mentions

0

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