GitHub Advisoryadvisory · Go
GHSA-42x9-rr3c-gr59 Mattermost Server vulnerable to XSS through channel headers
MEDIUM
Official page ↗
- Aliases
- CVE-2017-18907
- Ecosystem
- Go
- Packages
- github.com/mattermost/mattermost-server
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
- Reviewed
- 2026-02-06
Affected packages
• Go github.com/mattermost/mattermost-server: < 3.9.2-0.20170714014920-312269ad0bd1 → fixed in 3.9.2-0.20170714014920-312269ad0bd1
• Go github.com/mattermost/mattermost-server: >= 3.10.0, < 3.10.2 → fixed in 3.10.2
Description
An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. XSS could occur via a channel header.
Related
Alias · CVE (1)
- CVE-2017-18907 An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. vulnerability
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2017-18907 advisory
- https://github.com/mattermost/mattermost/commit/312269ad0bd166174f07f9df7391fce714601600 web
- https://github.com/mattermost/mattermost/commit/4519b03d95e8bfe1b2f74094673ae1a2f39f6b47 web
- https://github.com/mattermost/mattermost/commit/a18479df0940be8503c9b88993490741793eba9e web
- https://github.com/mattermost/mattermost package
- https://mattermost.com/security-updates web