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CVE-2017-18903 High

Mattermost Server vulnerable to CSRF if CORS is enabled

An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. CSRF can occur if CORS is enabled.

Exploit probability 0.4%
Published May 24, 2022
Required by Not available
Last source change February 26, 2026

02 / AFFECTED SOFTWARE

Affected packages

Unknown Unknown

7 explicit affected versions

Go github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server

03 / CONNECTIONS

Connected vulnerabilities

related OPENSUSE-SU-2026:21483-1

04 / EVIDENCE

Source records

Open Source Vulnerabilities CVE-2017-18903

An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. CSRF can occur if CORS is enabled.

View original source
Open Source Vulnerabilities GO-2026-4305

Mattermost Server vulnerable to CSRF if CORS is enabled in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: .

View original source
Open Source Vulnerabilities GHSA-fcwg-45jh-5qhf

An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. CSRF can occur if CORS is enabled.

View original source

05 / REFERENCES

Further evidence