Server-Side Request Forgery (SSRF) in Mattermost Notification - CVE-2019-1003026
Published: October 24, 2019
Vulnerability identifier: #VU22261
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-1003026
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote user to perform SSRF attacks.
The vulnerability exists due to missing permission check in a form validation method. A remote authenticated user with Overall/Read permission can send a specially crafted HTTP request and connect Jenkins to an attacker-specified Mattermost server and room and send a message.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
Affected software
Mattermost Notification
How to mitigate CVE-2019-1003026
Install updates from vendor's website.
Mattermost Notification - update to 2.6.3