# CVE-2021-4246: roxlukas LMeve Login Page sql injection

> Remote attackers can exploit SQL injection in the LMeve login page via the X-Forwarded-For header to access or modify data.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Dec 2022
- **Updated:** 15 Apr 2025
- **Also known as:** GHSA-g5jc-hc65-x4vm

## What is CVE-2021-4246?

CVE-2021-4246 is a medium-severity SQL injection vulnerability in roxlukas LMeve, published on 17 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in roxlukas LMeve and classified as critical. Affected by this issue is some unknown functionality of the component Login Page. The manipulation of the argument X-Forwarded-For leads to sql injection. The attack may be launched remotely. The name of the patch is 29e1ead3bb1c1fad53b77dfc14534496421c5b5d. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-216176.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), CWE-707 (Improper Neutralization)

## Which versions are affected by CVE-2021-4246?

It affects 1 product.


Products: Roxlukas Lmeve.

## How do I fix CVE-2021-4246?

No fix has been published for CVE-2021-4246 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-4246 being exploited?

There is no known exploitation of CVE-2021-4246 in the wild and no public exploit code.

## Other vulnerabilities in roxlukas LMeve

- [CVE-2018-25071](https://insights.sbomify.com/CVE-2018-25071/): roxlukas LMeve proxy.php insert_log sql injection (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-4246 and fix it if it is affected.

What it is: CVE-2021-4246 is a medium-severity SQL injection vulnerability in roxlukas LMeve, published on 17 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-4246 in the wild and no public exploit code.

Affected product: roxlukas LMeve. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2021-4246/ (Markdown: https://insights.sbomify.com/CVE-2021-4246/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-4246
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-4246
- OSV: https://osv.dev/vulnerability/CVE-2021-4246

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-4246/
Summaries are generated and may contain mistakes; the official description above is the record.