CVE-2017-18902 json
Mattermost Server exposes team invite IDs through API endpoints
published 2020-06-19 6 y ago modified 2026-06-17 4 mo ago also GHSA-jwfv-5hwq-f97r , GO-2025-4185 , EUVD-2017-9992
- 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 team invite IDs via team API endpoints.
Patch / fix
- go github.com/mattermost/mattermost-server 3.10.3, 3.10.3+incompatible, 4.0.4, 4.0.4+incompatible, 4.1.0, 4.1.0+incompatible
- mattermost mattermost_server 3.10.3, 4.0.4
- govulncheck-vulndb SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 0.0.20251209T172047-150000.1.127.1
suse advisories SUSE-SU-2025:4395-1
- 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 >=4.0.5-rc1, <4.1.0 <3.10.3+incompatible >=4.0.0+incompatible, <4.0.4+incompatible >=4.0.5-rc1+incompatible, <4.1.0+incompatible |
3.10.3 4.0.4 4.1.0 3.10.3+incompatible 4.0.4+incompatible 4.1.0+incompatible |
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
mattermost.com
/security-updates/
vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2017-18902
advisory
-
github.com
/mattermost/mattermost
package
-
mattermost.com
/security-updates
web
-
github.com
/advisories/GHSA-jwfv-5hwq-f97r
advisory
Sources
- CVE List CVE-2017-18902
- GitHub Advisory GHSA-jwfv-5hwq-f97r
- NVD CVE-2017-18902
- OSV GO-2025-4185
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.