Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-43306

24
FAUCET Score

CVE-2021-43306 describes an exponential Regular Expression Denial of Service (ReDoS) vulnerability in the jquery-validation npm package, specifically affecting the url2 method. An unauthenticated attacker can trigger this vulnerability by providing specially crafted input, leading to a denial of service. While rated as High severity (CVSS 7.5), indicating a significant impact on availability, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.19.4CPE matchmatch criteria
cpe:2.3:a:jqueryvalidation:jquery_validation:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.42%
Probability of exploitation in next 30 days
EPSS Percentile
70.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0142 is in the 51st percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: jquery-validationFixed in: 1.19.4

Vendor Advisories (1)

npmGHSA-j9m2-h2pv-wvphlow

Regular expression denial of service in jquery-validation

Jun 3, 2022

References

research.jfrog.com / vulnerabilities/jquery-validation-redos-xray-211348
ExploitThird Party Advisory