# CVE-2021-20662: Missing authorization in SolarView Compact

> An attacker can modify critical settings in SolarView Compact without authentication due to missing access controls.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Feb 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-954j-r82g-vr2p

## What is CVE-2021-20662?

CVE-2021-20662 is a high-severity missing authorization vulnerability in Contec Co., Ltd. SolarView Compact, published on 24 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Missing authentication for critical function in SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows an attacker to alter the setting information without the access privileges via unspecified vectors.

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

## Which versions are affected by CVE-2021-20662?

It affects 1 product.


Products: Contec Sv-Cpt-Mc310 Firmware.

## How do I fix CVE-2021-20662?

No fix has been published for CVE-2021-20662 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-20662 being exploited?

There is no known exploitation of CVE-2021-20662 in the wild and no public exploit code.

## Other vulnerabilities in Contec Co., Ltd. SolarView Compact

- [CVE-2022-29303](https://insights.sbomify.com/CVE-2022-29303/): SolarView Compact Command Injection (critical 9.8, exploited in the wild)
- [CVE-2022-31374](https://insights.sbomify.com/CVE-2022-31374/): File upload in n/a (critical 9.8)
- [CVE-2021-20658](https://insights.sbomify.com/CVE-2021-20658/): SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows an attacker to execute arbitrary OS commands with the web server privilege via unspecified vectors. (critical 9.8)
- [CVE-2023-27514](https://insights.sbomify.com/CVE-2023-27514/): Command injection in SolarView Compact (high 8.8)
- [CVE-2023-27518](https://insights.sbomify.com/CVE-2023-27518/): Memory corruption in SolarView Compact (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-20662 and fix it if it is affected.

What it is: CVE-2021-20662 is a high-severity missing authorization vulnerability in Contec Co., Ltd. SolarView Compact, published on 24 Feb 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-2021-20662 in the wild and no public exploit code.

Affected product: Contec Co., Ltd. SolarView Compact. 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-2021-20662/ (Markdown: https://insights.sbomify.com/CVE-2021-20662/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20662
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20662
- OSV: https://osv.dev/vulnerability/CVE-2021-20662

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-20662/
Summaries are generated and may contain mistakes; the official description above is the record.