# CVE-2021-23937: DNS based denial of service in Apache Wicket

Source: https://junglewise.ai/threats/cve-2021-23937-dns-based-denial-of-service-in-apache-wicket  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-24  
License: CC BY 4.0 with a link back

CVE-2021-23937 · Severity: low · CVSS 3.1 · Published 2022-05-24

DNS based denial of service in Apache Wicket

Technologies: [org.apache.wicket:wicket-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-wicket-wicket-core). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2021-23937 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-23937 being exploited in the wild.

**How severe is CVE-2021-23937?** Low severity, with a CVSS score of 3.1, published 24 May 2022.

**Which products and versions are affected?** org.apache.wicket:wicket-core (Maven) ECOSYSTEM:introduced=9.0.0,fixed=9.3.0.

**Is there a fix for CVE-2021-23937?** Yes. org.apache.wicket:wicket-core (Maven): upgrade to 9.3.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-23937?** Check whether you run org.apache.wicket:wicket-core (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.apache.wicket:wicket-core (Maven): upgrade to 9.3.0 or later

  ```sh
  # set org.apache.wicket:wicket-core to 9.3.0 in your pom.xml or build.gradle
  ```


## Affected products

- org.apache.wicket:wicket-core (Maven) ECOSYSTEM:introduced=9.0.0,fixed=9.3.0

## Identifiers

- CVE-2021-23937
- GHSA-hmhg-95wh-r699

## Related threats

- [Apache Wicket path traversal in FolderUploadsFileManager](https://junglewise.ai/threats/cve-2026-43975-apache-wicket-path-traversal-in-folderuploadsfilemanager)
- [Apache Wicket: An attacker can intentionally trigger a memory leak](https://junglewise.ai/threats/cve-2024-53299-apache-wicket-an-attacker-can-intentionally-trigger-a-memory-leak)
- [Apache Wicket allows attackers to check for third-party libraries](https://junglewise.ai/threats/cve-2014-0043-apache-wicket-allows-attackers-to-check-for-third-party-libraries)
- [Apache Wicket vulnerable to CSRF attacks](https://junglewise.ai/threats/cve-2016-6806-apache-wicket-vulnerable-to-csrf-attacks)
- [Apache Wicket Sensitive Data Exposure](https://junglewise.ai/threats/cve-2014-3526-apache-wicket-sensitive-data-exposure)