CVE-2017-18891
Moderate
Mattermost Server does not safeguard against phishing via error page links in github.com/mattermost/mattermost-server
Mattermost Server does not safeguard against phishing via error page links in github.com/mattermost/mattermost-server
Exploit probability
0.7%
Published
January 13, 2026
Required by
Not available
Last source change
March 3, 2026
02 / AFFECTED SOFTWARE
Affected packages
17 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2017-18891
View original source
An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It allows Phishing because an error page can have a link.
Open Source Vulnerabilities
GO-2026-4298
View original source
Mattermost Server does not safeguard against phishing via error page links in github.com/mattermost/mattermost-server
Open Source Vulnerabilities
GHSA-vrh2-rprg-rgc6
View original source
An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It allows Phishing because an error page can have a link.
05 / REFERENCES