Medium severity5.3NVD Advisory· Published Jun 19, 2020· Updated Jun 17, 2026
CVE-2017-18873
CVE-2017-18873
Description
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to cause a denial of service (channel invisibility) via a misformatted post.
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 | < 4.1.2-0.20171013141717-ee57a5829ab1 | 4.1.2-0.20171013141717-ee57a5829ab1 |
github.com/mattermost/mattermost-serverGo | >= 4.2.0, < 4.2.1-0.20171013140502-b3e4b0ac9168 | 4.2.1-0.20171013140502-b3e4b0ac9168 |
github.com/mattermost/mattermost-serverGo | >= 4.3.0-rc1, < 4.3.0 | 4.3.0 |
Affected products
9cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: <4.1.2
- cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc4:*:*:*:*:*:*
- Mattermost/Serverdescription
- ghsa-coords3 versionspkg:golang/github.com/mattermost/mattermost-serverpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 4.1.2-0.20171013141717-ee57a5829ab1+ 2 more
- (no CPE)range: < 4.1.2-0.20171013141717-ee57a5829ab1
- (no CPE)range: < 0.0.20260226T182644-150000.1.149.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-x6mw-hf2j-vqpcghsaADVISORY
- mattermost.com/security-updates/nvdVendor Advisory
- nvd.nist.gov/vuln/detail/CVE-2017-18873ghsaADVISORY
- github.com/mattermost/mattermost/commit/9adaf53e110e0e806b21903111aacb93129668cbghsaWEB
- github.com/mattermost/mattermost/commit/b3e4b0ac91682093276a653f7ccd5774aaa9cd06ghsaWEB
- github.com/mattermost/mattermost/commit/ee57a5829ab162859e0e355dac6cfe6ca1a8f379ghsaWEB
- mattermost.com/security-updatesghsaWEB
News mentions
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