# CVE-2021-28169: Jetty Utility Servlets ConcatServlet Double Decoding Information Disclosure Vulnerability

Source: https://junglewise.ai/threats/cve-2021-28169-jetty-utility-servlets-concatservlet-double-decoding-information  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-06-10  
License: CC BY 4.0 with a link back

CVE-2021-28169 · Severity: low · CVSS 3.1 · Published 2021-06-10

Jetty Utility Servlets ConcatServlet Double Decoding Information Disclosure Vulnerability

Technologies: [org.eclipse.jetty:jetty-servlets (Maven)](https://junglewise.ai/threats/technologies/org-eclipse-jetty-jetty-servlets). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2021-28169 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-28169 being exploited in the wild.

**How severe is CVE-2021-28169?** Low severity, with a CVSS score of 3.1, published 10 June 2021.

**Which products and versions are affected?** org.eclipse.jetty:jetty-servlets (Maven) ECOSYSTEM:introduced=0,fixed=9.4.41.

**Is there a fix for CVE-2021-28169?** Yes. org.eclipse.jetty:jetty-servlets (Maven): upgrade to 9.4.41 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-28169?** Check whether you run org.eclipse.jetty:jetty-servlets (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.eclipse.jetty:jetty-servlets (Maven): upgrade to 9.4.41 or later

  ```sh
  # set org.eclipse.jetty:jetty-servlets to 9.4.41 in your pom.xml or build.gradle
  ```


## Affected products

- org.eclipse.jetty:jetty-servlets (Maven) ECOSYSTEM:introduced=0,fixed=9.4.41

## Identifiers

- CVE-2021-28169
- GHSA-gwcr-j4wh-j3cq

## Related threats

- [Eclipse Jetty's PushSessionCacheFilter can cause remote DoS attacks](https://junglewise.ai/threats/cve-2024-6762-eclipse-jetty-s-pushsessioncachefilter-can-cause-remote-dos)
- [Eclipse Jetty has a denial of service vulnerability on DosFilter](https://junglewise.ai/threats/cve-2024-9823-eclipse-jetty-has-a-denial-of-service-vulnerability-on-dosfilter)
- [Jetty vulnerable to errant command quoting in CGI Servlet](https://junglewise.ai/threats/cve-2023-36479-jetty-vulnerable-to-errant-command-quoting-in-cgi-servlet)