CVE-2021-28146
On Grafana instances using an external authentication service, this vulnerability allows any authenticated user to add external groups to existing teams.
Does this matter?
Lower severity and a low EPSS score (1.40%). Track it; it rarely justifies an emergency change on its own.
Description
The team sync HTTP API in Grafana Enterprise 7.4.x before 7.4.5 has an Incorrect Access Control issue. On Grafana instances using an external authentication service, this vulnerability allows any authenticated user to add external groups to existing teams. This can be used to grant a user team permissions that the user isn't supposed to have.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.40% probability · 72th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- grafana/grafana
- Source
- cve@mitre.org
EPSS 1.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://community.grafana.com/t/grafana-enterprise-6-7-6-7-3-10-and-7-4-5-security-update/44724Vendor Advisory
- https://community.grafana.com/t/release-notes-v6-7-x/27119Release Notes, Vendor Advisory
- https://grafana.com/blog/2021/03/18/grafana-6.7.6-7.3.10-and-7.4.5-released-with-important-security-fixes-for-grafana-enterprise/Release Notes, Vendor Advisory
- https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-3-10/Release Notes, Vendor Advisory
- https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-4-5/Release Notes, Vendor Advisory
- https://grafana.com/products/enterprise/Product, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2021/03/19/5Mailing List, Third Party Advisory
- https://community.grafana.com/t/grafana-enterprise-6-7-6-7-3-10-and-7-4-5-security-update/44724Vendor Advisory
- https://community.grafana.com/t/release-notes-v6-7-x/27119Release Notes, Vendor Advisory
- https://grafana.com/blog/2021/03/18/grafana-6.7.6-7.3.10-and-7.4.5-released-with-important-security-fixes-for-grafana-enterprise/Release Notes, Vendor Advisory
- https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-3-10/Release Notes, Vendor Advisory
- https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-4-5/Release Notes, Vendor Advisory
- https://grafana.com/products/enterprise/Product, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2021/03/19/5Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.