Datasette is an open source multi-tool for exploring and publishing data. The ?_trace=1 debugging feature in Datasette does not correctly escape generated HTML, resulting in a reflected cross-site scripting vulnerability. This vulnerability is particularly relevant if your Datasette installation includes authenticated features using plugins such as datasette-auth-passwords as an attacker could use the vulnerability to access protected data. Datasette 0.57 and 0.56.1 both include patches for this issue. If you run Datasette behind a proxy you can workaround this issue by rejecting any incoming requests with ?_trace= or &_trace= in their query string parameters.
CVE-2021-32670
This high-severity CVE scores 7.2 under NVD CVSS v3. EPSS exploit probability: 1.0% (60th percentile of EPSS-scored CVEs). 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
A fix is available — apply it.
- CVSS v3
- 7.2
- EG Score
- 7.2HIGHmedium confidence
- EG Risk
- 37EG Risk 37/100CISA SSVC
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 computedSeverity72% × 45%Exploitation1% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 1.0%
- EPSS %ILE
- 60th
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
June 7, 2021
Last Modified
November 21, 2024
References (10)
- security-advisories@githubhttps://datasette.io/plugins/datasette-auth-passwords
- security-advisories@githubhttps://github.com/simonw/datasette/issues/1360
- security-advisories@githubhttps://github.com/simonw/datasette/security/advisories/GHSA-xw7c-jx9m-xh5g
- security-advisories@githubhttps://owasp.org/www-community/attacks/xss/#reflected-xss-attacks
- security-advisories@githubhttps://pypi.org/project/datasette/
- af854a3a-2127-422b-91ae-364da2661108https://datasette.io/plugins/datasette-auth-passwords
- af854a3a-2127-422b-91ae-364da2661108https://github.com/simonw/datasette/issues/1360
- af854a3a-2127-422b-91ae-364da2661108https://github.com/simonw/datasette/security/advisories/GHSA-xw7c-jx9m-xh5g
- af854a3a-2127-422b-91ae-364da2661108https://owasp.org/www-community/attacks/xss/#reflected-xss-attacks
- af854a3a-2127-422b-91ae-364da2661108https://pypi.org/project/datasette/
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| datasette | 0.10 ... 0.9 (92 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 35× 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 188 total refreshes for this CVE.
- 2026-10-10 19:56 UTCEPSS rescore
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- 2026-10-09 19:55 UTCOSV refresh
- 2026-10-08 16:39 UTCEPSS rescore
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- 2026-09-20 03:20 UTCOSV refresh
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- 2026-08-15 06:37 UTCOSV refresh
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- 2026-07-30 18:50 UTCOSV refresh
- 2026-07-30 16:25 UTCEPSS rescore
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- 2026-07-23 02:00 UTCEG score recompute
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- 2026-07-22 14:06 UTCEPSS rescore
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- 2026-07-18 10:02 UTCEPSS rescore
Related CVEs(same product + same CWE)
Same CWE
10 shownCWE-79
Frequently asked(5)
What is CVE-2021-32670?
When was CVE-2021-32670 disclosed?
Is CVE-2021-32670 actively exploited?
What is the CVSS score of CVE-2021-32670?
How do I remediate CVE-2021-32670?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-32670
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