CVE-2019-20866

MEDIUM

Mattermost Server < 5.12.0 - HTTP Request Smuggling via Proxy Header Mishandling

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_confirm
https://mattermost.com/security-updates/

Scores

CVSS v3 5.3
EPSS 0.0092
EPSS Percentile 55.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Details

CWE
CWE-444
Status published
Products (1)
mattermost/mattermost_server < 5.12.0
Published Jun 19, 2020
Tracked Since Feb 18, 2026