High severity7.5NVD Advisory· Published Jun 19, 2020· Updated Jun 17, 2026
CVE-2017-18871
CVE-2017-18871
Description
An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.
AI Insight
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 | < 4.2.2 | 4.2.2 |
github.com/mattermost/mattermost-serverGo | >= 4.3.0-rc1, < 4.3.4 | 4.3.4 |
github.com/mattermost/mattermost-serverGo | >= 4.4.0-rc1, < 4.4.5 | 4.4.5 |
github.com/mattermost/mattermost-serverGo | >= 4.5.0-rc1, < 4.5.0 | 4.5.0 |
Affected products
10- Mattermost/Mattermost Serverdescription
- ghsa-coords4 versionspkg:golang/github.com/mattermost/mattermost-serverpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0pkg:rpm/suse/govulncheck-vulndb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6
< 4.2.2+ 3 more
- (no CPE)range: < 4.2.2
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
- (no CPE)range: < 0.0.20251209T172047-150000.1.127.1
- (no CPE)range: < 0.0.20251209T172047-150000.1.127.1
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: <4.2.2
- cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc4:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-jc6w-8r7f-vmp5ghsaADVISORY
- mattermost.com/security-updates/nvdVendor Advisory
- nvd.nist.gov/vuln/detail/CVE-2017-18871ghsaADVISORY
- mattermost.com/security-updatesghsaWEB
News mentions
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