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CVE-2025-2571

Google OAuth Authentication Bypass for Converted Bot Accounts

MEDIUM
4.2
CVSS Score
Published: May 30, 2025 at 02:22 PM UTC
Updated: June 17, 2026 at 09:07 AM UTC
2 products affected across 1 vendorMattermost ServerMattermost

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Severity
MEDIUM4.2
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mattermost Server· Mattermost
95%
10.5.0 ≤ v < 10.5.410.6.0 ≤ v < 10.6.310.7.0 ≤ v < 10.7.19.11.0 ≤ v < 9.11.13
Mattermost· Mattermost
60%
10.5.0 ≤ v ≤ 10.5.310.6.0 ≤ v ≤ 10.6.29.11.0 ≤ v ≤ 9.11.1210.5.010.6.010.7.09.11.0
Vendor states this is fixed in 10.5.4 (unaffected)
Vendor states this is fixed in 10.6.3 (unaffected)
Vendor states this is fixed in 10.7.1 (unaffected)
Vendor states this is fixed in 10.8.0 (unaffected)
Vendor states this is fixed in 9.11.13 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://mattermost.com/security-updates

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.2MEDIUMMattermost
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-303

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