CVE-2023-4478

MEDIUM

Mattermost < 7.8.9 - Unauthenticated User Registration Blocking via Signup Parameter Manipulation

Title source: llm
STIX 2.1

Description

Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts.

References (1)

Core 1
Core References

Scores

CVSS v3 4.3
EPSS 0.0037
EPSS Percentile 59.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-74
Status published
Products (2)
mattermost/mattermost_server 8.0.0
mattermost/mattermost_server < 7.8.9
Published Aug 25, 2023
Tracked Since Feb 18, 2026