4.3

CVE-2025-3227: Unauthorized channel member management through playbook runs

Analyzed
AliasesGHSA-qwwm-c582-82rxGO-2025-3772
Published 20-06-2025Last modified 23-06-2025

Vulnerability summary

CVE-2025-3227 is a medium (CVSS 4.3) Incorrect Authorization vulnerability in mattermost. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.25%
0%100%
Low · 0.00 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. 20-06-2025
    PublishedVulnerability first disclosed.
  2. 23-06-2025
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public and private channels by manipulating playbook run participants when the run is linked to a channel.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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, low-privilege 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
  • mattermost≥ 10.5.0, ≤ 10.5.5 | ≥ 9.11.0, ≤ 9.11.15 | 10.8.0 | ≥ 10.7.0, ≤ 10.7.2 | ≥ 10.6.0, ≤ 10.6.5
  • mattermost_serverEOL≥ 9.11.0, < 9.11.16 | ≥ 10.5.0, < 10.5.6 | ≥ 10.6.0, < 10.6.6 | ≥ 10.7.0, < 10.7.3 | 10.8.0 | 10.8.0:rc1 | 10.8.0:rc2 | 10.8.0:rc3
Github.com/mattermost1 product
  • mattermost-server< 0.0.0-20250520060012-d0380305ef7a | ≥ 10.8.0+incompatible, < 10.8.1+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8≥ 10.5.0, < 10.5.6 | ≥ 9.11.0, < 9.11.16 | ≥ 10.8.0, < 10.8.1 | ≥ 10.7.0, < 10.7.3 | ≥ 10.6.0, < 10.6.6 | < 8.0.0-20250520060012-d0380305ef7a

4 vendors · 6 products

References

4 links