CVE-2021-28146 Missing authorization in n/a

What is CVE-2021-28146?

CVE-2021-28146 is a medium-severity missing authorization vulnerability in Grafana Grafana, published on 22 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-863

Which versions are affected by CVE-2021-28146?

1 open source package ship an affected version, including grafana. It affects 1 product.

Products include Grafana Grafana.

How do I fix CVE-2021-28146?

Upgrade grafana to 7.4.5 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-28146 being exploited?

There is no known exploitation of CVE-2021-28146 in the wild and no public exploit code.

Other vulnerabilities in Grafana Grafana

• CVE-2021-43798 Grafana Path Traversal Exploited High 7.5
• CVE-2025-41115 Incorrect privilege assignment Critical 10.0
• CVE-2022-39328 Grafana vulnerable to race condition allowing privilege escalation Critical 9.8
• CVE-2022-28660 Auth bypass in n/a Critical 9.8
• CVE-2022-26148 Information disclosure in n/a Critical 9.8

All Grafana Grafana vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-grafana-2021-28146, GHSA-xfc5-hp99-89qr.