# CVE-2021-21427: Backport for CVE-2021-21024 Blind SQLi from Magento 2

> An administrator can exploit a blind SQL injection vulnerability to access restricted resources in Magento LTS.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 21 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-fvrf-9428-527m

## What is CVE-2021-21427?

CVE-2021-21427 is a critical SQL injection vulnerability in OpenMage magento-lts, published on 21 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Magento-lts is a long-term support alternative to Magento Community Edition (CE). A vulnerability in magento-lts versions before 19.4.13 and 20.0.9 potentially allows an administrator unauthorized access to restricted resources. This is a backport of CVE-2021-21024. The vulnerability is patched in versions 19.4.13 and 20.0.9.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2021-21427?

4 open source packages ship an affected version, including openmage/magento-lts. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `openmage/magento-lts` | Packagist | All versions | 19.4.13 |
| `openmage/magento-lts` | Packagist | All versions | 19.4.13 |
| `openmage/magento-lts` | Packagist | From 20.0.0 | 20.0.9 |
| `openmage/magento-lts` | Packagist | From 20.0.0 | 20.0.9 |

Products: Openmage Magento.

## How do I fix CVE-2021-21427?

Upgrade openmage/magento-lts to a fixed version for your release line: 19.4.13 or 20.0.9.

## Is CVE-2021-21427 being exploited?

There is no known exploitation of CVE-2021-21427 in the wild and no public exploit code.

## Other vulnerabilities in OpenMage magento-lts

- [CVE-2021-21426](https://insights.sbomify.com/CVE-2021-21426/): Fixes a bug in Zend Framework's Stream HTTP Wrapper (critical 9.8)
- [CVE-2021-41144](https://insights.sbomify.com/CVE-2021-41144/): OpenMage LTS authenticated remote code execution through layout update (high 8.8)
- [CVE-2026-40488](https://insights.sbomify.com/CVE-2026-40488/): OpenMage LTS has Customer File Upload Extension Blocklist Bypass that Leads to Remote Code Execution (high 8.7)
- [CVE-2026-25524](https://insights.sbomify.com/CVE-2026-25524/): OpenMage LTS's Phar Deserialization leads to Remote Code Execution (high 8.1)
- [CVE-2020-15244](https://insights.sbomify.com/CVE-2020-15244/): RCE in Magento (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-21427 and fix it if it is affected.

What it is: CVE-2021-21427 is a critical SQL injection vulnerability in OpenMage magento-lts, published on 21 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-21427 in the wild and no public exploit code.

Affected packages and fixed versions:
- openmage/magento-lts (Packagist): affected all versions; fixed in 19.4.13
- openmage/magento-lts (Packagist): affected all versions; fixed in 19.4.13
- openmage/magento-lts (Packagist): affected from 20.0.0; fixed in 20.0.9
- openmage/magento-lts (Packagist): affected from 20.0.0; fixed in 20.0.9

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-2021-21427/ (Markdown: https://insights.sbomify.com/CVE-2021-21427/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-21427
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-21427
- OSV: https://osv.dev/vulnerability/CVE-2021-21427

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-21427/
Summaries are generated and may contain mistakes; the official description above is the record.