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CVE-2019-18413

3.7 · LOW

In TypeStack class-validator 0.10.2, validate() input validation can be bypassed because certain internal attributes can be overwritten via a conflicting name.

Published Oct 24, 2019CWE-79EPSS 1.99%

Overview

CVE-2019-18413 is a low-severity vulnerability. It was published on October 24, 2019 and has a CVSS 3.1 base score of 3.7 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In TypeStack class-validator 0.10.2, validate() input validation can be bypassed because certain internal attributes can be overwritten via a conflicting name. Even though there is an optional forbidUnknownValues parameter that can be used to reduce the risk of this bypass, this option is not documented and thus most developers configure input validation in the vulnerable default manner. With this vulnerability, attackers can launch SQL Injection or XSS attacks by injecting arbitrary malicious input. NOTE: a software maintainer agrees with the "is not documented" finding but suggests that much of the responsibility for the risk lies in a different product.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/typestack/class-validator#passing-optionsGitHubgithub.com/typestack/class-validator/issues/1422#issuecomment-1344635415GitHubgithub.com/typestack/class-validator/issues/438GitHubgithub.com/typestack/class-validator/issues/438#issuecomment-964728471GitHubgithub.com/typestack/class-validator#passing-optionsGitHubgithub.com/typestack/class-validator/issues/1422#issuecomment-1344635415GitHubgithub.com/typestack/class-validator/issues/438GitHubgithub.com/typestack/class-validator/issues/438#issuecomment-964728471

How CyberStrike helps

Frequently asked questions

What is CVE-2019-18413?

CVE-2019-18413 is a low-severity vulnerability. It was published on October 24, 2019 and has a CVSS 3.1 base score of 3.7 (LOW).

How severe is CVE-2019-18413?

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-18413?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-18413?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-18413 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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