---
id: CVE-2019-16766
aliases:
  - GHSA-89px-ww3j-g2mm
  - PYSEC-2019-135
title: 2FA bypass in Wagtail through new device path
summary: 2FA bypass in Wagtail through new device path
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N'
vendor: wagtail-2fa
product: wagtail-2fa
ecosystem: pip
affected:
  - wagtail-2fa < 1.3.0
patched:
  - wagtail-2fa 1.3.0
published: '2019-11-29'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:49:24.668776466Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-89px-ww3j-g2mm'
references:
  - url: >-
      https://github.com/labd/wagtail-2fa/security/advisories/GHSA-89px-ww3j-g2mm
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2019-16766'
  - url: >-
      https://github.com/labd/wagtail-2fa/commit/13b12995d35b566df08a17257a23863ab6efb0ca
  - url: >-
      https://github.com/labd/wagtail-2fa/commit/a6711b29711729005770ff481b22675b35ff5c81
  - url: 'https://github.com/labd/wagtail-2fa'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/wagtail-2fa/PYSEC-2019-135.yaml
tags:
  - osv
  - pip
epss: 0.01462
epssPercentile: 0.72473
ingestedAt: '2026-09-12T03:13:01.676Z'
---

## Overview

## 2FA bypass through new device path

### Impact
If someone gains access to someone's Wagtail login credentials, they can log into the CMS and bypass the 2FA check by changing the URL. They can then add a new device and gain full access to the CMS.

### Patches
This problem has been patched in version 1.3.0.

### Workarounds
There is no workaround at the moment.

### For more information
If you have any questions or comments about this advisory:
* Open an issue in [github.com/labd/wagtail-2fa](https://github.com/labd/wagtail-2fa)
* Email us at [security@labdigital.nl](mailto:security@labdigital.nl)

## Affected packages

- `wagtail-2fa < 1.3.0`

## Remediation

Upgrade to a patched release:

- `wagtail-2fa 1.3.0`