# CVE-2020-5233: The pattern '/\domain.com' is not disallowed when redirecting, allowing for open redirect

Source: https://junglewise.ai/threats/cve-2020-5233-the-pattern-domain-com-is-not-disallowed-when-redirecting-allowing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-12-20  
License: CC BY 4.0 with a link back

CVE-2020-5233 · Severity: low · CVSS 3.1 · Published 2021-12-20

The pattern '/\domain.com' is not disallowed when redirecting, allowing for open redirect

Technologies: [github.com/oauth2-proxy/oauth2-proxy (Go)](https://junglewise.ai/threats/technologies/github-com-oauth2-proxy-oauth2-proxy). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2020-5233 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-5233 being exploited in the wild.

**How severe is CVE-2020-5233?** Low severity, with a CVSS score of 3.1, published 20 December 2021.

**Which products and versions are affected?** github.com/oauth2-proxy/oauth2-proxy (Go) SEMVER:introduced=0,fixed=5.0.0.

**Is there a fix for CVE-2020-5233?** Yes. github.com/oauth2-proxy/oauth2-proxy (Go): upgrade to 5.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2020-5233?** Check whether you run github.com/oauth2-proxy/oauth2-proxy (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/oauth2-proxy/oauth2-proxy (Go): upgrade to 5.0.0 or later

  ```sh
  go get github.com/oauth2-proxy/oauth2-proxy@v5.0.0
  ```


## Affected products

- github.com/oauth2-proxy/oauth2-proxy (Go) SEMVER:introduced=0,fixed=5.0.0

## Identifiers

- CVE-2020-5233
- GHSA-qqxw-m5fj-f7gv

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