3.1

CVE-2025-6227: Invite token is used as part of the secure communication

Analyzed
AliasesGHSA-4fwj-8595-wp25GO-2025-3818
Published 18-07-2025Last modified 18-07-2025

Vulnerability summary

CVE-2025-6227 is a low (CVSS 3.1) Insufficiently Protected Credentials vulnerability in mattermost. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2.2, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
3.1/10
010
Low · v3.1 (NVD)
EPSS score
0.22%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2025:15405-1

Timeline

  1. 18-07-2025
    PublishedVulnerability first disclosed.
  2. 18-07-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6All versions (No fix recorded)
Mattermost2 products
Github.com/mattermost1 product
  • mattermost-server≥ 10.5.0, < 10.5.8 | ≥ 9.11.0, < 9.11.17 | ≥ 10.5.0+incompatible, < 10.5.8+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8< 8.0.0-20250612074655-8f8612c63783

4 vendors · 6 products

References

5 links