CVE-2021-21252: The jQuery Validation Plugin provides drop-in validation for your existing forms

This month

MEDIUM 5.3REMOTEUPGRADEMITIGATE

CVE-2021-21252 is a medium-severity flaw (CVSS 5.3) affecting jquery validation, snapcenter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.6% (top 11%)
CISA exploited list	No
Weakness	CWE-400
Published	2021-01-13
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: jqueryvalidation · netapp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-01-13 19:15 UTCPublished CVE record published
2026-06-17 03:35 UTCUpdated Record last modified

jqueryvalidation jquery validation UPGRADE

Affected: < 1.19.3

Fixed in: 1.19.3

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls jquery-validation

2. UPGRADE to 1.19.3

npm install jquery-validation@">=1.19.3"

netapp snapcenter MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy snapcenter || rpm -q snapcenter || snapcenter --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-21252?

jquery validation: upgrade to 1.19.3; snapcenter: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-21252 being exploited?

CVE-2021-21252 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-21252 affect?

CVE-2021-21252 affects jquery validation, snapcenter. Severity is medium (CVSS 5.3). 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

How urgent is CVE-2021-21252?

Priority 46/100. Remotely exploitable, no login, no user action

Software pages

npm packages vulnerabilities · jQuery vulnerabilities

Related CVEs

CVE-2022-31147 HIGH 7.5 UPGRADE The jQuery Validation Plugin (jquery-validation) provides drop-in validation for forms
CVE-2021-43306 MEDIUM 5.9 UPGRADE An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm pack

References

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