6.1

CVE-2025-62690: mattermost Open Redirect

CVSS: 6.1v3.1MediumAnalyzed
AliasesGHSA-q66g-q98c-q454GO-2025-4248
Published 17-12-2025Last modified 17-12-2025
Open JSON

Vulnerability summary

CVE-2025-62690 is a medium (CVSS 6.1) Open Redirect vulnerability in mattermost. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.7% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
0.15%
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 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:0142-1

Timeline

  1. 17-12-2025
    PublishedVulnerability first disclosed.
  2. 17-12-2025
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.11.x <= 10.11.4 fail to validate redirect URLs on the /error page, which allows an attacker to redirect a victim to a malicious site via a crafted link opened in a new tab.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

0.00 pp

From 0.15% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.15%

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

Github.com/mattermost2 products
  • mattermost≥ 10.11.0-rc1, < 10.11.5-0.20251016131338-dad6bd7a1509 | ≥ 11.0.0-alpha.1, < 11.1.0 | ≥ 10.11.0-rc1+incompatible, < 11.1.0+incompatible
  • mattermost-serverAll versions (No fix recorded)
Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6All versions (No fix recorded)
Mattermost2 products
Github.com/mattermost/mattermost/server1 product
  • v8≥ 8.0.0-20250721062209-4952acea88ce, < 8.0.0-20251016131338-dad6bd7a1509

4 vendors · 7 products

References

5 links