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Medium severity5.3NVD Advisory· Published Jun 19, 2020· Updated Jun 17, 2026

CVE-2019-20866

CVE-2019-20866

Description

An issue was discovered in Mattermost Server before 5.12.0. Use of a Proxy HTTP header, rather than the source address in an IP packet header, for obtaining IP address information was mishandled.

AI Insight

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

Affected products

3
  • Mattermost/Mattermost2 versions
    cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: <5.12.0
    • (no CPE)range: <5.12.0
  • Mattermost/Serverdescription

Patches

Vulnerability mechanics

References

1

News mentions

0

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