CVE-2021-43306
CVE-2021-43306 is a medium-severity vulnerability in Jqueryvalidation Jquery Validation with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1333.
Key facts
- Severity: Medium (CVSS 3.x base score 5.9)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (68th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-1333
- Affected product: Jqueryvalidation Jquery Validation
- Published:
- Last modified:
Description
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
Frequently asked questions
- What is CVE-2021-43306?
- An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
- How severe is CVE-2021-43306?
- CVE-2021-43306 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2021-43306 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-43306?
- CVE-2021-43306 affects Jqueryvalidation Jquery Validation. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-43306?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-43306 published?
- CVE-2021-43306 was published on 2022-06-02 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:jqueryvalidation:jquery_validation:*:*:*:*:*:node.js:*:*
More vulnerabilities in Jqueryvalidation Jquery Validation
- CVE-2022-31147 — High (CVSS 7.5): The jQuery Validation Plugin (jquery-validation) provides drop-in validation for forms. Versions of jquery-validation…
- CVE-2021-21252 — Medium (CVSS 5.3): The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package…
All CVEs affecting Jqueryvalidation Jquery Validation →
Other CWE-1333 vulnerabilities
- CVE-2026-35458 — Critical (CVSS 9.8): Gotenberg is an API for converting document formats. In 8.29.1 and earlier, Gotenberg uses dlclark/regexp2 to compile…
- CVE-2023-29486 — Critical (CVSS 9.8): An issue was discovered in Heimdal Thor agent versions 3.4.2 and before 3.7.0 on Windows, allows attackers to bypass…
- CVE-2026-25547 — Critical (CVSS 9.2): @isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1,…
- CVE-2023-29487 — Critical (CVSS 9.1): An issue was discovered in Heimdal Thor agent versions 3.4.2 and before on Windows and 2.6.9 and before on macOS,…
- CVE-2026-47138 — High (CVSS 8.7): Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to…
- CVE-2025-6998 — High (CVSS 8.7): ReDoS in strip_whitespaces() function in cps/string_helper.py in Calibre Web and Autocaliweb allows unauthenticated…