# CVE-2021-28148: Missing authorization in n/a

> Unauthenticated access to a Grafana Enterprise API endpoint allows attackers to cause denial of service by sending unlimited requests.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** BIT-grafana-2021-28148, GHSA-qhvm-m99m-qq44

## What is CVE-2021-28148?

CVE-2021-28148 is a high-severity missing authorization vulnerability in Grafana Grafana, published on 22 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

One of the usage insights HTTP API endpoints in Grafana Enterprise 6.x before 6.7.6, 7.x before 7.3.10, and 7.4.x before 7.4.5 is accessible without any authentication. This allows any unauthenticated user to send an unlimited number of requests to the endpoint, leading to a denial of service (DoS) attack against a Grafana Enterprise instance.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2021-28148?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `grafana` | Bitnami | From 6.0.0 | 6.7.6, 7.3.10, 7.4.5 |

Products: Grafana Grafana.

## How do I fix CVE-2021-28148?

Upgrade grafana to a fixed version for your release line: 6.7.6, 7.3.10 or 7.4.5.

## Is CVE-2021-28148 being exploited?

There is no known exploitation of CVE-2021-28148 in the wild and no public exploit code.

## Other vulnerabilities in Grafana Grafana

- [CVE-2021-43798](https://insights.sbomify.com/CVE-2021-43798/): Grafana Path Traversal (high 7.5, exploited in the wild)
- [CVE-2025-41115](https://insights.sbomify.com/CVE-2025-41115/): Incorrect privilege assignment (critical 10.0)
- [CVE-2022-39328](https://insights.sbomify.com/CVE-2022-39328/): Grafana vulnerable to race condition allowing privilege escalation (critical 9.8)
- [CVE-2022-28660](https://insights.sbomify.com/CVE-2022-28660/): Auth bypass in n/a (critical 9.8)
- [CVE-2022-26148](https://insights.sbomify.com/CVE-2022-26148/): Information disclosure in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-28148 and fix it if it is affected.

What it is: CVE-2021-28148 is a high-severity missing authorization vulnerability in Grafana Grafana, published on 22 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-28148 in the wild and no public exploit code.

Affected packages and fixed versions:
- grafana (Bitnami): affected from 6.0.0; fixed in 6.7.6, 7.3.10, 7.4.5

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-28148/ (Markdown: https://insights.sbomify.com/CVE-2021-28148/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28148
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28148
- OSV: https://osv.dev/vulnerability/CVE-2021-28148

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28148/
Summaries are generated and may contain mistakes; the official description above is the record.