# CVE-2021-23837: SQL injection in n/a

> Attackers can exploit a time-based blind SQL injection in the acp interface to retrieve sensitive database information from flatCore CMS.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **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:** 15 Jan 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-r9gv-5v96-9377

## What is CVE-2021-23837?

CVE-2021-23837 is a medium-severity SQL injection vulnerability in n/a, published on 15 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An issue was discovered in flatCore before 2.0.0 build 139. A time-based blind SQL injection was identified in the selected_folder HTTP request body parameter for the acp interface. The affected parameter (which retrieves the file contents of the specified folder) was found to be accepting malicious user input without proper sanitization, thus leading to SQL injection. Database related information can be successfully retrieved.

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

## Which versions are affected by CVE-2021-23837?

It affects 1 product.


Products: Flatcore Flatcore.

## How do I fix CVE-2021-23837?

No fix has been published for CVE-2021-23837 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-23837 being exploited?

There is no known exploitation of CVE-2021-23837 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-13961](https://insights.sbomify.com/CVE-2019-13961/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2020-17452](https://insights.sbomify.com/CVE-2020-17452/): File upload in n/a (high 7.2)
- [CVE-2019-10652](https://insights.sbomify.com/CVE-2019-10652/): File upload in n/a (high 7.2)
- [CVE-2017-9451](https://insights.sbomify.com/CVE-2017-9451/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2021-40555](https://insights.sbomify.com/CVE-2021-40555/): Cross-site scripting in n/a (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-23837 and fix it if it is affected.

What it is: CVE-2021-23837 is a medium-severity SQL injection vulnerability in n/a, published on 15 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-23837 in the wild and no public exploit code.

Affected product: n/a. 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-2021-23837/ (Markdown: https://insights.sbomify.com/CVE-2021-23837/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-23837
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-23837
- OSV: https://osv.dev/vulnerability/CVE-2021-23837

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-23837/
Summaries are generated and may contain mistakes; the official description above is the record.