VULNERABILITY INTELLIGENCE

CVE-2020-7965

CVSS score8.8 HIGH
EPSS probability0.61%
CISA KEVNot currently listed
Published2020-01-29
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

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.

Weakness classification

  • CWE-352: Cross-Site Request Forgery (CSRF)

Primary references