What’s Vulnerable › Vulnerabilities

CVE-2021-21252: Regular expression denial of service in jquery-validation

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-13 · updated 2026-06-17
• Weakness: CWE-400

Description

The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.

Affected products

• jquery-validation: before 1.19.3 — fixed in 1.19.3
• NetApp SnapCenter: all versions

How to fix

Upgrade to a fixed version: jquery-validation 1.19.3. Check the vendor advisory for mitigations.

References

• https://github.com/jquery-validation/jquery-validation/commit/5d8f29eef363d043a8fec4eb86d42cadb5fa5f7d
• https://github.com/jquery-validation/jquery-validation/pull/2371
• https://github.com/jquery-validation/jquery-validation/security/advisories/GHSA-jxwx-85vp-gvwm
• https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
• https://security.netapp.com/advisory/ntap-20210219-0005/
• https://www.npmjs.com/package/jquery-validation
• https://github.com/jquery-validation/jquery-validation/commit/5d8f29eef363d043a8fec4eb86d42cadb5fa5f7d
• https://github.com/jquery-validation/jquery-validation/pull/2371
• https://github.com/jquery-validation/jquery-validation/security/advisories/GHSA-jxwx-85vp-gvwm
• https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
• https://security.netapp.com/advisory/ntap-20210219-0005/
• https://www.npmjs.com/package/jquery-validation

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