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Fencer Intel
medium 4.2

CVE-2025-2571 json

Google OAuth Authentication Bypass for Converted Bot Accounts

published last yr. modified 4mo ago also GHSA-8cgx-9ccj-3gwr , GO-2025-3729 , EUVD-2025-16490

cvss
4.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/mattermost/mattermost/server/v8 8.0.0-20250414095146-04676582cdd2, 9.11.13, 10.5.4, 10.6.3, 10.7.1
  • go github.com/mattermost/mattermost-server 9.11.13+incompatible, 10.5.4+incompatible, 10.6.3+incompatible, 10.7.1+incompatible
  • Mattermost Mattermost 9.11.13, 10.5.4, 10.6.3, 10.7.1, 10.8.0
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250612T141001-1.1

opensuse advisories openSUSE-SU-2025:15225-1

Is CVE-2025-2571 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
GitHub 3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/mattermost/mattermost/server/v8
>=10.7.0-rc1, <10.7.1
>=10.0.0-rc1, <10.5.4
>=9.0.0-rc1, <9.11.13
<8.0.0-20250414095146-04676582cdd2
>=10.6.0-rc1, <10.6.3
10.7.1
10.5.4
9.11.13
8.0.0-20250414095146-04676582cdd2
10.6.3
go github.com/mattermost/mattermost-server
>=9.0.0-rc1+incompatible, <9.11.13+incompatible
>=10.0.0-rc1+incompatible, <10.5.4+incompatible
>=10.6.0-rc1+incompatible, <10.6.3+incompatible
>=10.7.0-rc1+incompatible, <10.7.1+incompatible
9.11.13+incompatible
10.5.4+incompatible
10.6.3+incompatible
10.7.1+incompatible
go github.com/mattermost/mattermost-server/v5
all versions
 no fix listed
go github.com/mattermost/mattermost-server/v6
all versions
 no fix listed

Affected products

  • Mattermost Mattermost

Classification

Weakness
  • CWE-303 Incorrect Implementation of Authentication Algorithm

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.