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TI-2025-38882 Aliases CVE-2025-62690GHSA-q66g-q98c-q454

Open redirect in error page when link opened in new tab

Priority LOW 26CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00149 4th percentileScored 2026-11-07
Fix Fixed Mattermost (Mattermost): 11.1.0, 10.11.5github.com/mattermost/mattermost/server/v8 (Go): 8.0.0-20251016131338-dad6bd7a1509+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MattermostMattermost10.11.0 – 10.11.411.1.0, 10.11.5Patch availableCNA
—github.com/mattermost/mattermost/server/v8 (Go)8.0.0-20250721062209-4952acea88ce to before 8.0.0-20251016131338-dad6bd7a15098.0.0-20251016131338-dad6bd7a1509Patch availableGHSA-q66g-q98c-q454
—github.com/mattermost/mattermost (Go)10.11.0-rc1 to before 10.11.5-0.20251016131338-dad6bd7a150910.11.5-0.20251016131338-dad6bd7a1509Patch availableGHSA-q66g-q98c-q454
—github.com/mattermost/mattermost (Go)11.0.0-alpha.1 to before 11.1.011.1.0Patch availableGHSA-q66g-q98c-q454
  • Mattermost VendorMattermost Affected 10.11.0 – 10.11.4 Fixed in 11.1.0, 10.11.5 Patch available CNA
  • github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected 8.0.0-20250721062209-4952acea88ce to before 8.0.0-20251016131338-dad6bd7a1509 Fixed in 8.0.0-20251016131338-dad6bd7a1509 Patch available GHSA-q66g-q98c-q454
  • github.com/mattermost/mattermost (Go) Vendor— Affected 10.11.0-rc1 to before 10.11.5-0.20251016131338-dad6bd7a1509 Fixed in 10.11.5-0.20251016131338-dad6bd7a1509 Patch available GHSA-q66g-q98c-q454
  • github.com/mattermost/mattermost (Go) Vendor— Affected 11.0.0-alpha.1 to before 11.1.0 Fixed in 11.1.0 Patch available GHSA-q66g-q98c-q454

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*10.11.0 to before 10.11.5VulnerableMattermost
  • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* Versions 10.11.0 to before 10.11.5 Vulnerable ·Mattermost

Remediation

  • Fix · CNA Mattermost (Mattermost) Fixed in 11.1.0, 10.11.5
  • Fix · GHSA-q66g-q98c-q454 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 8.0.0-20251016131338-dad6bd7a1509 Advisory →
  • Fix · GHSA-q66g-q98c-q454 github.com/mattermost/mattermost (Go) Fixed in 10.11.5-0.20251016131338-dad6bd7a1509 Advisory →
  • Fix · GHSA-q66g-q98c-q454 github.com/mattermost/mattermost (Go) Fixed in 11.1.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-62690
  2. 2026-10-03 Alias added: GHSA-q66g-q98c-q454

References

Advisory 2

Other 2

  • TI-2025-18933 Arbitrary file read in Mattermost Boards via import & export board archive CVSS 3.1CRITICAL 9.9
  • TI-2025-04465 Path Traversal Leading to RCE by Any Authenticated Mattermost User CVSS 3.1CRITICAL 9.9
  • TI-2017-14068 An issue was discovered in Mattermost Server before 3.6.2. CVSS 3.1CRITICAL 9.8
  • TI-2017-14060 An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. CVSS 3.1CRITICAL 9.8
  • TI-2017-14048 An issue was discovered in Mattermost Server before 4.1.0, 4.0.4, and 3.10.3. CVSS 3.1CRITICAL 9.8
  • TI-2025-14360 Arbitrary file read via block duplication in Mattermost Boards CVSS 3.1CRITICAL 9.9
See all 505 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences