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CVE-2021-21252

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.
An official patch is available. Apply the patch as soon as possible.
5.3
CVSS
1.7
ShadowTrackr
NO
CISA KEV
-
NCSC.nl
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityNone
IntegrityNone
AvailabilityLow
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch

Change Log
DateSourceChangesScore
2026-07-21nvdpatch: Unavailable→Official Patch1.7 → 1.7
2026-07-21cve.orginitial, patch: Unavailable1.7

Affected Software
VendorProductVersion
jquery-validationjquery-validation< 1.19.3
jqueryvalidationjquery_validation< 1.19.3
netappsnapcenterAll versions
Published: 2021-01-13