What is CVE-2022-23623?

CVE-2022-23623 is a high-severity improper input validation vulnerability in frourio (npm), affecting versions < 0.26.0. It is fixed in 0.26.0. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.

How severe is CVE-2022-23623?

CVE-2022-23623 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of frourio are affected by CVE-2022-23623?

frourio (npm) versions < 0.26.0 is affected.

Is there a fix for CVE-2022-23623?

Yes. CVE-2022-23623 is fixed in 0.26.0. Upgrade to this version or later.

Is CVE-2022-23623 exploitable, and should I be worried?

Whether CVE-2022-23623 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2022-23623 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

How do I fix CVE-2022-23623?

Upgrade frourio to 0.26.0 or later.

CVE-2022-23623 in frourio

Q: How severe is CVE-2022-23623?

CVE-2022-23623 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of frourio are affected by CVE-2022-23623?

frourio (npm) versions < 0.26.0 is affected.

Q: Is there a fix for CVE-2022-23623?

Yes. CVE-2022-23623 is fixed in 0.26.0. Upgrade to this version or later.

Q: Is CVE-2022-23623 exploitable, and should I be worried?

Whether CVE-2022-23623 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2022-23623 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2022-23623?

Upgrade frourio to 0.26.0 or later.

Summary

Validation bypass in frourio

日本語

影響

v0.26.0以前のfrourioを使用している、かつvalidators/を利用している場合、ネストされたバリデータがリクエストのボディーとクエリに対して正しく働かないケースがあります。また、リクエストに対してバリデーションが効かなくなる入力があります。

パッチ

frourioをv0.26.0かそれ以降のバージョンにアップデートをお願いします。frourio を使用したプロジェクトには class-transformer と reflect-metadata の依存への追加も必要となります。

ワークアラウンド

controller側で自分でclass-transformerを使用してチェックする、vaildatorを使わない、など。

さらなる情報

このセキュリティ勧告に関する質問やコメントについては、以下の方法でお問い合わせいただけます。

frourioにIssueを開く。

English

Workarounds

Validate objects from request with class-transformer in controllers by yourself, or prevent using validators.

For more information

If you have any questions or comments about this advisory:

Open an issue in frourio

Impact

Frourio users who uses frourio version prior to v0.26.0 and integration with class-validator through validators/ folder. Validators does not work properly for request bodies and queries in specific situations. Addtionally, some kind of input is not validated. (false positives)

The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths. Typical impact: varies by context: data corruption, logic bypass, or denial of service.

CVE-2022-23623 has a CVSS score of 8.1 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.26.0); upgrading removes the vulnerable code path.

Affected versions

frourio (< 0.26.0)

Security releases

frourio → 0.26.0 (npm)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

Already deployed Kodem?

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Remediation advice

Please update your frourio to v0.26.0 or later. You also need to install class-transformer and reflect-metadata to your project.

Frequently Asked Questions

What is CVE-2022-23623? CVE-2022-23623 is a high-severity improper input validation vulnerability in frourio (npm), affecting versions < 0.26.0. It is fixed in 0.26.0. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.
How severe is CVE-2022-23623? CVE-2022-23623 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of frourio are affected by CVE-2022-23623? frourio (npm) versions < 0.26.0 is affected.
Is there a fix for CVE-2022-23623? Yes. CVE-2022-23623 is fixed in 0.26.0. Upgrade to this version or later.
Is CVE-2022-23623 exploitable, and should I be worried? Whether CVE-2022-23623 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2022-23623 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2022-23623? Upgrade frourio to 0.26.0 or later.