Grafana Stored Cross-site Scripting in Unified Alerting

Today we are releasing Grafana 8.3.10, 8.4.10, 8.5.9 and 9.0.3. This patch release includes a HIGH severity security fix for a stored Cross Site Scripting in Grafana.

Release v.9.0.3, containing this security fix and other patches:

• Download Grafana 9.0.3
• Release notes

Release v.8.5.9, containing this security fix and other fixes:

• Download Grafana 8.5.9
• Release notes

Release v.8.4.10, containing this security fix and other fixes:

• Download Grafana 8.4.10
• Release notes

Release v.8.3.10, containing this security fix and other fixes:

• Download Grafana 8.3.10

Stored XSS (CVE-2022-31097)

Summary

On June 19 a security researcher contacted Grafana Labs to disclose a XSS vulnerability in the Unified Alerting feature of Grafana. After analysis, this stored XSS could be used to elevate privileges from Editor to Admin.

We believe that this vulnerability is rated at CVSS 7.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N).

Impact

An attacker can exploit this vulnerability to escalate privilege from editor to admin by tricking an authenticated admin to click on a link.

Affected versions with HIGH severity

All Grafana >=8.0 versions are affected by this vulnerability.

Solutions and mitigations

All installations after Grafana v8.0 should be upgraded as soon as possible.

As a workaround it is possible to disable alerting or use legacy alerting.

Appropriate patches have been applied to Grafana Cloud and as always, we closely coordinated with all cloud providers licensed to offer Grafana Pro. They have received early notification under embargo and confirmed that their offerings are secure at the time of this announcement. This is applicable to Amazon Managed Grafana.

Timeline

Here is a detailed timeline starting from when we originally learned of the issue. All times in UTC.

2022-06-19 10:32 - Research submission of vulnerability report 2022-06-20 14:35- Issue triaged, confirmed positive, and internal incident raised 2022-06-20 18:40 - Fix PR submitted and reviewed 2022-06-23 07:12 - All Grafana Cloud hosted Grafana instances patched 2022-07-05 07:14 - Customers informed under embargo 2022-07-14 02:00 - Public release

Acknowledgement

We would like to thank Maxim Misharin for responsibly disclosing the vulnerability.

Reporting security issues

If you think you have found a security vulnerability, please send a report to [email protected]. This address can be used for all of Grafana Labs' open source and commercial products (including, but not limited to Grafana, Grafana Cloud, Grafana Enterprise, and grafana.com). We can accept only vulnerability reports at this address. We would prefer that you encrypt your message to us by using our PGP key. The key fingerprint is

F988 7BEA 027A 049F AE8E 5CAA D125 8932 BE24 C5CA

The key is available from keyserver.ubuntu.com.

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