CVE-2017-18904
Moderate
Mattermost Server vulnerable to XSS via an uploaded file in github.com/mattermost/mattermost-server
Mattermost Server vulnerable to XSS via an uploaded file 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
7 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2017-18904
View original source
An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. It allows XSS via an uploaded file.
Open Source Vulnerabilities
GO-2026-4302
View original source
Mattermost Server vulnerable to XSS via an uploaded file in github.com/mattermost/mattermost-server
Open Source Vulnerabilities
GHSA-8pff-p3gx-w4jf
View original source
An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. It allows XSS via an uploaded file.
05 / REFERENCES
Further evidence
- https://mattermost.com/security-updates/
- https://github.com/advisories/GHSA-8pff-p3gx-w4jf
- https://github.com/mattermost/mattermost/commit/6a2754376c8c8270be5e11e3fdab589659d0cc8d
- https://github.com/mattermost/mattermost/commit/bde06a7bc3a03a56da224c1ffcd8bffb0af8071b
- https://github.com/mattermost/mattermost/commit/f06c5bef4d78966c60b153bbec6eea4ec0be9e68
- https://mattermost.com/security-updates
- https://nvd.nist.gov/vuln/detail/CVE-2017-18904
- https://github.com/mattermost/mattermost