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.
CVE-2020-7965
This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 61% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EG Risk
- 44(Track)EG Risk 44/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity88% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 39.1%
- KEV
- Not listed
Published
January 29, 2020
Last Modified
November 21, 2024
References (2)
- cve@mitrehttps://webargs.readthedocs.io/en/latest/changelog.html
- af854a3a-2127-422b-91ae-364da2661108https://webargs.readthedocs.io/en/latest/changelog.html
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| webargs | 5.0.0 ... 5.5.2 (14 versions) | 5.5.3 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 14× in last 7d / 51× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 104 total refreshes for this CVE.
- 2026-07-23 14:15 UTCEPSS rescore
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Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2020-7965?
When was CVE-2020-7965 disclosed?
Is CVE-2020-7965 actively exploited?
What is the CVSS score of CVE-2020-7965?
How do I remediate CVE-2020-7965?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-7965
Is Your Infrastructure Affected by CVE-2020-7965?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.