Critical severity9.1NVD Advisory· Published Jun 19, 2020· Updated Jun 17, 2026
CVE-2017-18883
CVE-2017-18883
Description
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2, when serving as an OAuth 2.0 Service Provider. There is low entropy for authorization data.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost-serverGo | < 4.1.2 | 4.1.2 |
github.com/mattermost/mattermost-serverGo | >= 4.2.0-rc1, < 4.2.1 | 4.2.1 |
github.com/mattermost/mattermost-serverGo | >= 4.3.0-rc1, < 4.3.0 | 4.3.0 |
Affected products
4- Mattermost/Serverdescription
- ghsa-coords3 versionspkg:golang/github.com/mattermost/mattermost-serverpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/govulncheck-vulndb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP6
< 4.1.2+ 2 more
- (no CPE)range: < 4.1.2
- (no CPE)range: < 0.0.20251209T172047-150000.1.127.1
- (no CPE)range: < 0.0.20251209T172047-150000.1.127.1
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-w8cc-3h7q-jhc3ghsaADVISORY
- mattermost.com/security-updates/nvdVendor Advisory
- nvd.nist.gov/vuln/detail/CVE-2017-18883ghsaADVISORY
- mattermost.com/security-updatesghsaWEB
News mentions
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