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CVE-2021-21252

26
FAUCET Score

CVE-2021-21252 is a Regular Expression Denial of Service (ReDoS) vulnerability affecting the jQuery Validation Plugin (npm package "jquery-validation") prior to version 1.19.3. This vulnerability, rated 7.5 HIGH on the CVSS scale, allows an unauthenticated attacker to cause a denial of service (A:H) with low attack complexity (AC:L) over the network (AV:N). There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.19.3CPE matchmatch criteria
cpe:2.3:a:jqueryvalidation:jquery_validation:*:*:*:*:*:node.js:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.44%
Probability of exploitation in next 30 days
EPSS Percentile
87.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0344 is in the 78th 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: jquery-validationFixed in: 1.19.3
nugetpatch availablevia ghsa
Product: jQuery.ValidationFixed in: 1.19.3

Vendor Advisories (2)

npmGHSA-jxwx-85vp-gvwmhigh

Regular Expression Denial of Service in jquery-validation

Jan 13, 2021
redhatCVE-2021-21252Moderate

jquery-validate: jquery.validate.js vulnerable to ReDoS

Jan 13, 2021

References

github.com / jquery-validation/jquery-validation/commit/5d8f29eef363d043a8fec4eb86d42cadb5fa5f7d
PatchThird Party Advisory
github.com / jquery-validation/jquery-validation/pull/2371
PatchThird Party Advisory
github.com / jquery-validation/jquery-validation/security/advisories/GHSA-jxwx-85vp-gvwm
Third Party Advisory
lists.debian.org / debian-lts-announce/2023/08/msg00040.html
security.netapp.com / advisory/ntap-20210219-0005
Third Party Advisory
npmjs.com / package/jquery-validation
ProductThird Party Advisory