GO-2025-4184

vendorUSosv

Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server

view advisory published 2025-12-08Licence: per source

Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2017-18871US	high7.5	1.12% (66th)	—	2020-06-19
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…

references

External citations — patches, advisories, analysis.

https://github.com/advisories/GHSA-jc6w-8r7f-vmp5ADVISORY
https://mattermost.com/security-updatesWEB
https://nvd.nist.gov/vuln/detail/CVE-2017-18871ADVISORY

scry

Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.

Free scan