4.3

CVE-2025-27571: mattermost Incorrect Authorization

CVSS: 4.3v3.1MediumAnalyzed
AliasesGHSA-h4rr-f37j-4hh7GO-2025-3619CGA-7hq7-j422-j783
Published 16-04-2025Last modified 16-04-2025
Open JSON

Vulnerability summary

CVE-2025-27571 is a medium (CVSS 4.3) Incorrect Authorization vulnerability in mattermost. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.5% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 2
OPENSUSE-SU-2025:15017-1CGA-FR5J-QRFP-9VXG

Timeline

  1. 16-04-2025
    PublishedVulnerability first disclosed.
  2. 16-04-2025
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the "Allow Users to View Archived Channels" configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • mattermost-fips-10.5All versions (No fix recorded)
  • mattermost-fips-10.5-compatAll versions (No fix recorded)
Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6All versions (No fix recorded)
Mattermost2 products
  • mattermost≥ 10.5.0, ≤ 10.5.1 | ≥ 10.4.0, ≤ 10.4.3 | ≥ 9.11.0, ≤ 9.11.9
  • mattermost_server≥ 9.11.0, < 9.11.10 | ≥ 10.4.0, < 10.4.4 | ≥ 10.5.0, < 10.5.2
Github.com/mattermost1 product
  • mattermost-server≥ 10.5.0+incompatible, < 10.5.2+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8≥ 10.5.0, < 10.5.2 | ≥ 10.4.0, < 10.4.4 | ≥ 9.11.0, < 9.11.10 | < 8.0.0-20250314142426-c049748b8863 | < 8.0.0-20250218121836-2b5275d87136

5 vendors · 8 products

References

11 links
Show all 11 references