CVE-2017-18871 — Uncaught Exception in Mattermost Mattermost-server

CWE-248 — Uncaught Exception5 documents4 sources
Severity
7.5HIGHNVD
EPSS
0.5%
top 32.46%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Github.com Mattermost Mattermost-serverMattermost Server
Timeline
PublishedJun 19
Latest updateDec 8

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDmattermost/mattermost_server4.3.0 — 4.3.4+3
▶Gogithub.com/mattermost_mattermost-server4.3.0-rc1+incompatible — 4.3.4+incompatible+7

🔴Vulnerability Details

4
OSV
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server↗2025-12-08
▶
OSV
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names↗2022-05-24
▶
GHSA
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names↗2022-05-24
▶
CVEList
CVE-2017-18871: An issue was discovered in Mattermost Server before 4↗2020-06-19
▶
CVE-2017-18871 — Uncaught Exception | cvebase