7.5high
CVE-2017-18871
Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names
Also known as GHSA-jc6w-8r7f-vmp5, GO-2025-4184
Published 6 y ago · modified 4 mo ago · JSON
CVSS
7.5
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
1.1%
percentile 66%
Public exploits
0
none known
Summary
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.
Exploit prediction (EPSS)
1.12% probability of exploitation in the next 30 days, higher than 66% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | <4.2.2 >=4.3.0-rc1, <4.3.4 >=4.4.0-rc1, <4.4.5 >=4.5.0-rc1, <4.5.0 <4.2.2+incompatible >=4.3.0-rc1+incompatible, <4.3.4+incompatible >=4.4.0-rc1+incompatible, <4.4.5+incompatible >=4.5.0-rc1+incompatible, <4.5.0+incompatible | 4.2.2 4.3.4 4.4.5 4.5.0 4.2.2+incompatible 4.3.4+incompatible 4.4.5+incompatible 4.5.0+incompatible |
Classification
- Weakness
- CWE-248 Uncaught Exception
References
- mattermost.com /security-updates/ · x_refsource_CONFIRM, x_transferred
- nvd.nist.gov /vuln/detail/CVE-2017-18871 · advisory
- github.com /mattermost/mattermost · package
- mattermost.com /security-updates · web
- github.com /advisories/GHSA-jc6w-8r7f-vmp5 · advisory
Sources
- CVE List: CVE-2017-18871
- GitHub Advisory: GHSA-jc6w-8r7f-vmp5
- NVD: CVE-2017-18871
- OSV: GO-2025-4184
vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.