4.3

CVE-2025-3228: Unauthorized Guest user access to Playbook

Analyzed
AliasesGHSA-4578-6gjh-f2jmGO-2025-3771
Published 20-06-2025Last modified 23-06-2025

Vulnerability summary

CVE-2025-3228 is a medium (CVSS 4.3) Incorrect Authorization vulnerability in mattermost. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 22.1% 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
0.29%
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 retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.29% 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