CVE-2025-2571 — Incorrect Implementation of Authentication Algorithm in Mattermost Mattermost-server

CWE-303 — Incorrect Implementation of Authentication AlgorithmCWE-122 — Heap-based Buffer Overflow6 documents5 sources
Severity
4.2MEDIUMNVD
EPSS
0.2%
top 61.29%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedMay 30
Latest updateJun 3

Description

Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to clear Google OAuth credentials when converting user accounts to bot accounts, allowing attackers to gain unauthorized access to bot accounts via the Google OAuth signup flow.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:NExploitability: 1.6 | Impact: 2.5

Affected Packages4 packages

▶NVDmattermost/mattermost_server9.11.0 — 9.11.13+3
▶Gogithub.com/mattermost_mattermost-server9.0.0-rc1+incompatible — 9.11.13+incompatible+3
▶Gogithub.com/mattermost_mattermost_server_v810.7.0-rc1 — 10.7.1+4
▶CVEListV5mattermost/mattermost10.6.0 — 10.6.2+3

🔴Vulnerability Details

4
OSV
Mattermost fails to clear Google OAuth credentials in github.com/mattermost/mattermost-server↗2025-06-03
▶
GHSA
Mattermost fails to clear Google OAuth credentials↗2025-05-30
▶
CVEList
Google OAuth Authentication Bypass for Converted Bot Accounts↗2025-05-30
▶
OSV
Mattermost fails to clear Google OAuth credentials↗2025-05-30
▶

📋Vendor Advisories

1
Microsoft
Heap-based Buffer Overflow in vim/vim↗2022-08-09
▶
CVE-2025-2571 — MEDIUM severity | cvebase