SQL Injection and Cross-site Scripting in class-validator
In TypeStack class-validator, 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.
The default settings for forbidUnknownValues has been changed to true in 0.14.0.
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | class-validator | < 0.14.0 | 0.14.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2019-18413
- https://github.com/typestack/class-validator/issues/1422#issuecomment-1344635415
- https://github.com/typestack/class-validator/issues/438
- https://github.com/typestack/class-validator/issues/438#issuecomment-964728471
- https://github.com/typestack/class-validator/pull/1798
- https://github.com/typestack/class-validator
- https://github.com/typestack/class-validator#passing-options
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-79, CWE-89- Platform
- npm
- Package
class-validator- Disclosed
- 12.10.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-fj58-h2fr-3pp2 - CC BY 4.0
Vulnerability history: class-validator
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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