---
id: CVE-2021-32721
aliases:
  - GHSA-mj9r-wwm8-7q52
  - GO-2021-0237
title: Open Redirect in github.com/AndrewBurian/powermux
summary: Open Redirect in github.com/AndrewBurian/powermux
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N'
vendor: AndrewBurian
product: github.com/AndrewBurian/powermux
ecosystem: go
affected:
  - github.com/AndrewBurian/powermux < 1.1.1
patched:
  - github.com/AndrewBurian/powermux 1.1.1
published: '2021-07-01'
updated: '2026-07-08'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-mj9r-wwm8-7q52'
references:
  - url: >-
      https://github.com/AndrewBurian/powermux/security/advisories/GHSA-mj9r-wwm8-7q52
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2021-32721'
  - url: 'https://github.com/AndrewBurian/powermux/pull/42'
  - url: >-
      https://github.com/AndrewBurian/powermux/commit/5e60a8a0372b35a898796c2697c40e8daabed8e9
tags:
  - osv
  - go
epss: 0.00606
epssPercentile: 0.46745
ingestedAt: '2026-07-09T18:56:36.637Z'
---

## Overview

### Impact
Attackers may be able to craft phishing links and other open redirects by exploiting the trailing slash redirection feature. This may lead to users being redirected to untrusted sites after following an attacker crafted link.

### Patches
The issue is resolved in v1.1.1

### Workarounds
There are no existing workarounds.
You may detect attempts to craft urls that exploit this feature by looking for request paths containing pairs of forward slashes in sequence combined with a trailing slash e.g. `https://example.com//foo/`


## Affected packages

- `github.com/AndrewBurian/powermux < 1.1.1`

## Remediation

Upgrade to a patched release:

- `github.com/AndrewBurian/powermux 1.1.1`