CVE-2021-43306 Exponential ReDoS in jquery-validation
An attacker can cause a denial of service by supplying malicious input to the url2 method in the jquery-validation library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-43306?
CVE-2021-43306 is a medium-severity denial of service vulnerability in jquery-validation, published on 1 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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
Weakness: CWE-1333
Which versions are affected by CVE-2021-43306?
2 open source packages ship an affected version, including jquery-validation. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
jquery-validation npm | All versions | 1.19.4 |
jquery-validation npm | All versions | 1.19.4 |
Products include Jqueryvalidation Jquery Validation.
How do I fix CVE-2021-43306?
Upgrade jquery-validation to 1.19.4 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-43306 being exploited?
There is no known exploitation of CVE-2021-43306 in the wild and no public exploit code.
Other vulnerabilities in jquery-validation
Sources
Also known as GHSA-j9m2-h2pv-wvph, UBUNTU-CVE-2021-43306.