id: PYSEC-2020-156
details: flaskparser.py in Webargs 5.x through 5.5.2 doesn't check that the Content-Type
  header is application/json when receiving JSON input. If the request body is valid
  JSON, it will accept it even if the content type is application/x-www-form-urlencoded.
  This allows for JSON POST requests to be made across domains, leading to CSRF.
affected:
- package:
    name: webargs
    ecosystem: PyPI
    purl: pkg:pypi/webargs
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: 5.0.0
    - fixed: 5.5.3
  versions:
  - 5.0.0
  - 5.1.0
  - 5.1.1
  - 5.1.1.post0
  - 5.1.2
  - 5.1.3
  - 5.2.0
  - 5.3.0
  - 5.3.1
  - 5.3.2
  - 5.4.0
  - 5.5.0
  - 5.5.1
  - 5.5.2
references:
- type: WEB
  url: https://webargs.readthedocs.io/en/latest/changelog.html
- type: ADVISORY
  url: https://github.com/advisories/GHSA-fjq3-5pxw-4wj4
aliases:
- CVE-2020-7965
- GHSA-fjq3-5pxw-4wj4
modified: '2020-02-03T16:36:00Z'
published: '2020-01-29T15:15:00Z'