7.5high
CVE-2017-18909
Mattermost Server SAML implementation does not require encryption or signature verification as default
Also known as GHSA-r6j5-fqx9-7qv9, GO-2026-4478
Published 6 y ago · modified 4 mo ago · JSON
CVSS
7.5
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
0.7%
percentile 52%
Public exploits
0
none known
Summary
An issue was discovered in Mattermost Server before 3.9.0 when SAML is used. Encryption and signature verification are not mandatory.
Exploit prediction (EPSS)
0.66% probability of exploitation in the next 30 days, higher than 52% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | <3.8.1-0.20170504181128-4f074fed0d65 all versions | 3.8.1-0.20170504181128-4f074fed0d65 |
Classification
References
- mattermost.com /security-updates/ · x_refsource_CONFIRM, x_transferred
- nvd.nist.gov /vuln/detail/CVE-2017-18909 · advisory
- github.com /mattermost/mattermost/commit/4f074fed0d653a28779ac586e418341232d43e95 · web
- github.com /mattermost/mattermost · package
- mattermost.com /security-updates · web
- github.com /advisories/GHSA-r6j5-fqx9-7qv9 · advisory
Sources
- CVE List: CVE-2017-18909
- GitHub Advisory: GHSA-r6j5-fqx9-7qv9
- NVD: CVE-2017-18909
- OSV: GO-2026-4478
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