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CVE-2020-7965

HIGH
8.8
CVSS Score
Published: January 29, 2020 at 02:33 PM UTC
Updated: June 17, 2026 at 03:25 AM UTC
1 product affected across 1 vendorWebargs

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Severity
HIGH8.8
Exploit prediction
EPSS 0.6%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Webargs· Webargs Project
95%
5.0.0 ≤ v ≤ 5.5.2

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMRelease NotesVendor Advisory
Source: [email protected]
https://webargs.readthedocs.io/en/latest/changelog.html

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-352

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