CVE-2021-21252 json
Regular expression denial of service in jquery-validation
published 2021-01-13 5 y ago modified 2026-07-08 4 mo ago also GHSA-jxwx-85vp-gvwm , EUVD-2021-0508
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.6%
- EPSS 3.6% chance of exploitation in 30 days, percentile 89%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm jquery-validation 1.19.3
- nuget jQuery.Validation 1.19.3
- jqueryvalidation jquery_validation 1.19.3
- phpmyadmin Debian 14, Debian 13, Debian 12 4:5.0.4+dfsg2-2
debian advisories DEBIAN-CVE-2021-21252
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2021-21252 updated cvss 7.5
jquery-validate: jquery.validate.js vulnerable to ReDoS
-
Red Hat Decision Manager 7 jquery-validation Red Hat Process Automation 7 jquery-validationnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
3.57% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | jquery-validation | <1.19.3 |
1.19.3 |
| nuget | jQuery.Validation | <1.19.3 |
1.19.3 |
Affected products
- jquery-validation jquery-validation
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
github.com
/jquery-validation/jquery-validation/pull/2371
web, patch, third-party-advisory
-
github.com
/jquery-validation/jquery-validation/commit/5d8f29eef363d043a8fec4eb86d42cadb5fa5f7d
web, patch, third-party-advisory
-
github.com
/jquery-validation/jquery-validation/security/advisories/GHSA-jxwx-85vp-gvwm
web, third-party-advisory
-
npmjs.com
/package/jquery-validation
web, product, third-party-advisory
-
security.netapp.com
/advisory/ntap-20210219-0005/
third-party-advisory
-
lists.debian.org
/debian-lts-announce/2023/08/msg00040.html
mailing-list, web
-
nvd.nist.gov
/vuln/detail/CVE-2021-21252
advisory
-
github.com
/jquery-validation/jquery-validation
package
-
jqueryvalidation.org
/#installation-via-package-managers
web
-
security.netapp.com
/advisory/ntap-20210219-0005
web
-
securitylab.github.com
/advisories/GHSL-2020-294-redos-jquery-validation
advisory
-
nuget.org
/packages/jquery.validation
web
Sources
- CVE List CVE-2021-21252
- GitHub Advisory GHSA-jxwx-85vp-gvwm
- NVD CVE-2021-21252
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.