# CVE-2021-32783: GO-2022-0922 - ExternalName Services can be used to gain access to Envoy's admin interface in github.com/projectcontour/contour

Source: https://junglewise.ai/threats/cve-2021-32783-externalname-services-can-be-used-to-gain-access-to-envoy-s-admin  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-08-21  
License: CC BY 4.0 with a link back

CVE-2021-32783 · Severity: low · CVSS 3.1 · Published 2024-08-21

ExternalName Services can be used to gain access to Envoy's admin interface in github.com/projectcontour/contour

Technologies: [github.com/projectcontour/contour (Go)](https://junglewise.ai/threats/technologies/github-com-projectcontour-contour). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2021-32783 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-32783 being exploited in the wild.

**How severe is CVE-2021-32783?** Low severity, with a CVSS score of 3.1, published 21 August 2024.

**Which products and versions are affected?** github.com/projectcontour/contour (Go) SEMVER:introduced=0,fixed=1.14.2, SEMVER:introduced=0,fixed=1.14.2,introduced=1.15.0,fixed=1.15.2,introduced=1.16.0,fixed=1.16.1,introduced=1.17.0,fixed=1.17.1.

**Is there a fix for CVE-2021-32783?** Yes. github.com/projectcontour/contour (Go): upgrade to 1.14.2, 1.17.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-32783?** Check whether you run github.com/projectcontour/contour (Go) 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

- github.com/projectcontour/contour (Go): upgrade to 1.14.2, 1.17.1 or later

  ```sh
  go get github.com/projectcontour/contour@v1.17.1
  ```


## Affected products

- github.com/projectcontour/contour (Go) SEMVER:introduced=0,fixed=1.14.2, SEMVER:introduced=0,fixed=1.14.2,introduced=1.15.0,fixed=1.15.2,introduced=1.16.0,fixed=1.16.1,introduced=1.17.0,fixed=1.17.1

## Identifiers

- CVE-2021-32783
- GHSA-5ph6-qq5x-7jwc
- GO-2022-0922

## Related threats

- [Project Contour JWT verification bypass in HTTPProxy](https://junglewise.ai/threats/cve-2026-50149-project-contour-jwt-verification-bypass-in-httpproxy)
- [Project Contour Lua code injection in Cookie Rewriting feature](https://junglewise.ai/threats/cve-2026-41246-project-contour-lua-code-injection-in-cookie-rewriting-feature)