# CVE-2021-40373: Code injection in n/a

> Attackers can execute arbitrary PHP code by injecting it into the core configuration page of playSMS.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Sep 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-qmpc-fmq6-gf8j

## What is CVE-2021-40373?

CVE-2021-40373 is a critical code injection vulnerability in n/a, published on 10 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

playSMS before 1.4.5 allows Arbitrary Code Execution by entering PHP code at the #tabs-information-page of core_main_config, and then executing that code via the index.php?app=main&inc=core_welcome URI.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2021-40373?

It affects 1 product.


Products: Playsms Playsms.

## How do I fix CVE-2021-40373?

No fix has been published for CVE-2021-40373 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-40373 being exploited?

There is no known exploitation of CVE-2021-40373 in the wild and no public exploit code.

Public exploit code:

- CVE-2021-40373 - remote code execution (github_poc): https://github.com/maikroservice/CVE-2021-40373

## Other vulnerabilities in n/a

- [CVE-2020-8644](https://insights.sbomify.com/CVE-2020-8644/): PlaySMS Server-Side Template Injection (critical 9.8, exploited in the wild)
- [CVE-2022-47034](https://insights.sbomify.com/CVE-2022-47034/): Auth bypass in n/a (critical 9.8)
- [CVE-2017-9101](https://insights.sbomify.com/CVE-2017-9101/): File upload in n/a (critical 9.8)
- [CVE-2017-9080](https://insights.sbomify.com/CVE-2017-9080/): File upload in n/a (high 8.8)
- [CVE-2008-5881](https://insights.sbomify.com/CVE-2008-5881/): Path traversal in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40373 and fix it if it is affected.

What it is: CVE-2021-40373 is a critical code injection vulnerability in n/a, published on 10 Sep 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-2021-40373 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-2021-40373/ (Markdown: https://insights.sbomify.com/CVE-2021-40373/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40373
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40373
- OSV: https://osv.dev/vulnerability/CVE-2021-40373

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40373/
Summaries are generated and may contain mistakes; the official description above is the record.