---
id: CVE-2022-0637
aliases:
  - GHSA-vg27-hr3v-3cqv
  - PYSEC-2026-738
title: open redirect in pollbot
summary: open redirect in pollbot
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
vendor: pollbot
product: pollbot
ecosystem: pip
affected:
  - pollbot < 1.4.6
patched:
  - pollbot 1.4.6
published: '2022-02-16'
updated: '2026-07-06'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-vg27-hr3v-3cqv'
references:
  - url: 'https://github.com/mozilla/PollBot/security/advisories/GHSA-vg27-hr3v-3cqv'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2022-0637'
  - url: 'https://github.com/mozilla/PollBot/pull/360'
  - url: >-
      https://github.com/mozilla/PollBot/commit/e39d8bec2df582ba525bb2e2f33c3ebc584d7ff8
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1753838'
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2022-0637'
  - url: 'https://github.com/mozilla/PollBot'
tags:
  - osv
  - pip
epss: 0.00429
epssPercentile: 0.36776
ingestedAt: '2026-07-08T18:25:53.320Z'
---

## Overview

(From https://bugzilla.mozilla.org/show_bug.cgi?id=1753838)

Summary:
There was an open redirection vulnerability in the path of:

https://pollbot.services.mozilla.com/ and https://pollbot.stage.mozaws.net/

Description:
An attacker can redirect anyone to malicious sites.

Steps To Reproduce:
Type in this URL:

https://pollbot.services.mozilla.com/%0a/evil.com/

It redirects to that website

evil.com

evil.com was used as an example but this could be any website. Note, the /%0a/ and trailing / are required.

Supporting Material/References:
https://cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html

Impact

Attackers can serve malicious websites that steal passwords or download ransomware to their victims machine due to a redirect and there are a heap of other attack vectors.

## Affected packages

- `pollbot < 1.4.6`

## Remediation

Upgrade to a patched release:

- `pollbot 1.4.6`