marshmallow-code/webargs · Security
Cross-Site Request Forgery in Webargs
- GHSA ID
- GHSA-fjq3-5pxw-4wj4
- CVE ID
- CVE-2020-7965
- Severity
- high
- Published
- Updated
- CVSS
- 8.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS v3
- 8.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS v4
- 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.
CWEs
- CWE-352 · Cross-Site Request Forgery (CSRF)
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-7965 ↗
- https://github.com/marshmallow-code/webargs/commit/b9ee8b0aa668207a363d9fd21d967eeadb975c3e ↗
- https://webargs.readthedocs.io/en/latest/changelog.html#b4-2020-01-28 ↗
- https://webargs.readthedocs.io/en/latest/changelog.html#id11 ↗
- https://github.com/pypa/advisory-database/tree/main/vulns/webargs/PYSEC-2020-156.yaml ↗
- https://webargs.readthedocs.io/en/latest/changelog.html ↗
- https://github.com/advisories/GHSA-fjq3-5pxw-4wj4 ↗