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CVE-2017-18871 High

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

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

Exploit probability 1.1%
Published December 8, 2025
Required by Not available
Last source change March 3, 2026

02 / AFFECTED SOFTWARE

Affected packages

Unknown Unknown

36 explicit affected versions

Go github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server

03 / CONNECTIONS

Connected vulnerabilities

related OPENSUSE-SU-2026:21483-1

04 / EVIDENCE

Source records

Open Source Vulnerabilities CVE-2017-18871

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.

View original source
Open Source Vulnerabilities GO-2025-4184

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

View original source
Open Source Vulnerabilities GHSA-jc6w-8r7f-vmp5

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.

View original source

05 / REFERENCES

Further evidence