CVE-2023-6202 json
Insecure Direct Object Reference in /plugins/focalboard/ api/v2/users of Mattermost Boards
published 2023-11-27 2 y ago modified 2026-09-10 1 mo ago also GHSA-85jj-c9jr-9jhx , EUVD-2023-2916
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
Mattermost fails to perform proper authorization in the /plugins/focalboard/api/v2/users endpoint allowing an attacker who is a guest user and knows the ID of another user to get their information (e.g. name, surname, nickname) via Mattermost Boards.
Patch / fix
- go github.com/mattermost/mattermost/server/v8 8.1.4, 9.0.2, 9.1.1
- go github.com/mattermost/mattermost-server/v6 7.8.13
- Mattermost Mattermost 7.8.13, 8.1.4, 9.0.2, 9.1.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | >=9.1.0, <9.1.1 >=9.0.0, <9.0.2 <8.1.4 |
9.1.1 9.0.2 8.1.4 |
| go | github.com/mattermost/mattermost-server/v6 | <7.8.13 |
7.8.13 |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
mattermost.com
/security-updates
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-6202
advisory
-
github.com
/mattermost/mattermost
package
Sources
- CVE List CVE-2023-6202
- GitHub Advisory GHSA-85jj-c9jr-9jhx
- NVD CVE-2023-6202
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