CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 6.4. It may be remotely exploitable. Exploitation may require the attacker to be authenticated.
CVE
CVE-2026-6673
Severity
MEDIUM
CVSS
6.4
EPSS
0.30%
Original NVD Description
Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret and disrupt the Jira integration via POST to /ac/installed during the pending-install window.. Mattermost Advisory ID: MMSA-2026-00654
Related CVEs
Other vulnerabilities affecting the same vendor(s)