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Mattermost has Insufficiently Protected Credentials

Low severity GitHub Reviewed Published Jul 18, 2025 to the GitHub Advisory Database • Updated Jul 21, 2025

Package

gomod github.com/mattermost/mattermost-server (Go)

Affected versions

>= 10.5.0, < 10.5.8
>= 9.11.0, < 9.11.17

Patched versions

10.5.8
9.11.17
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.0.0-20250612074655-8f8612c63783
8.0.0-20250612074655-8f8612c63783

Description

Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API.

References

Published by the National Vulnerability Database Jul 18, 2025
Published to the GitHub Advisory Database Jul 18, 2025
Last updated Jul 21, 2025
Reviewed Jul 21, 2025

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(7th percentile)

Weaknesses

Insufficiently Protected Credentials

The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. Learn more on MITRE.

CVE ID

CVE-2025-6227

GHSA ID

GHSA-4fwj-8595-wp25

Source code

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