Read the docs
TI-2023-06507 Aliases CVE-2023-7113GHSA-h3gq-j7p9-x3p4

Cross-site scripting in Mattermost

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
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-79.

Summary

Mattermost version 8.1.6 and earlier fails to sanitize channel mention data in posts, which allows an attacker to inject markup in the web client.

Why it matters now

EPSS 0.00296 22nd percentileScored 2026-11-07
Fix Fixed Mattermost (Mattermost): 8.1.7, 9.2.0github.com/mattermost/mattermost/server/v8 (Go): 8.1.7

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MattermostMattermostup to 8.1.6; up to 9.2.08.1.7, 9.2.0Patch availableCNA
—github.com/mattermost/mattermost/server/v8 (Go)before 8.1.78.1.7Patch availableGHSA-h3gq-j7p9-x3p4
  • Mattermost VendorMattermost Affected up to 8.1.6; up to 9.2.0 Fixed in 8.1.7, 9.2.0 Patch available CNA
  • github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected before 8.1.7 Fixed in 8.1.7 Patch available GHSA-h3gq-j7p9-x3p4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*before 8.1.7VulnerableMattermost
  • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* Versions before 8.1.7 Vulnerable ·Mattermost

Remediation

  • Fix · CNA Mattermost (Mattermost) Fixed in 8.1.7, 9.2.0
  • Fix · GHSA-h3gq-j7p9-x3p4 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 8.1.7 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-7113
  2. 2026-10-03 Alias added: GHSA-h3gq-j7p9-x3p4

References

Advisory 3

Other 1

  • 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