8.1high
CVE-2017-18884
Mattermost Server exposes OAuth personal access tokens to attackers
Also known as GHSA-876j-jfqf-m7j7, GO-2025-4197
Published 6 y ago · modified 4 mo ago · JSON
CVSS
8.1
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
0.8%
percentile 57%
Public exploits
0
none known
Summary
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to gain privileges by using a registered OAuth application with personal access tokens.
Exploit prediction (EPSS)
0.81% probability of exploitation in the next 30 days, higher than 57% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 5.5 | AV:N/AC:L/Au:S/C:P/I:P/A:N |
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | <4.1.2 >=4.2.0-rc1, <4.2.1 >=4.3.0-rc1, <4.3.0 <4.1.2+incompatible >=4.2.0-rc1+incompatible, <4.2.1+incompatible >=4.3.0-rc1+incompatible, <4.3.0+incompatible | 4.1.2 4.2.1 4.3.0 4.1.2+incompatible 4.2.1+incompatible 4.3.0+incompatible |
Classification
References
- mattermost.com /security-updates/ · x_refsource_CONFIRM, x_transferred
- nvd.nist.gov /vuln/detail/CVE-2017-18884 · advisory
- mattermost.com /security-updates · web
- github.com /advisories/GHSA-876j-jfqf-m7j7 · advisory
Sources
- CVE List: CVE-2017-18884
- GitHub Advisory: GHSA-876j-jfqf-m7j7
- NVD: CVE-2017-18884
- OSV: GO-2025-4197
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