CVE-2017-18901 json
Mattermost Server exposes private team invite ID
published 2020-06-19 6 y ago modified 2026-06-17 4 mo ago also GHSA-c253-8hr4-r8v9 , GO-2026-4304 , EUVD-2017-9991
- cvss
- 5.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
An issue was discovered in Mattermost Server before 4.1.0, 4.0.4, and 3.10.3. It allows attackers to discover a team invite ID by requesting a JSON document.
Patch / fix
- go github.com/mattermost/mattermost-server 3.10.3, 4.0.4
- mattermost mattermost_server 3.10.3, 4.0.4
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260114T191543-150000.1.137.1
suse advisories SUSE-SU-2026:0142-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
Exploit prediction
0.93% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | <3.10.3 >=4.0.0, <4.0.4 all versions |
3.10.3 4.0.4 |
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/mattermost/mattermost/commit/5e822a7d09214d5446d54e02a0611df8e64f3aa5
web
-
github.com
/mattermost/mattermost/commit/638c38cc0d2296335a0fbd5bde8b6d2cbf9f9062
web
-
github.com
/mattermost/mattermost/commit/a78ed923f1c73ae5551893374fb9803ee2f4c8e6
web
-
mattermost.com
/security-updates/
vendor-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2017-18901
advisory
-
github.com
/mattermost/mattermost
package
-
mattermost.com
/security-updates
web
Sources
- CVE List CVE-2017-18901
- GitHub Advisory GHSA-c253-8hr4-r8v9
- NVD CVE-2017-18901
- OSV GO-2026-4304
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.