CVE-2021-32670

Name: CVE-2021-32670
Creator: NVD / NIST
Published: 2021-06-07T22:15:07.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.96%

Last modified Jun 17, 2026

CVE-2021-32670 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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](https://owasp.org/www-community/attacks/xss/#reflected-xss-attacks) vulnerability. EPSS estimates a 0.96% chance of exploitation in the next 30 days.

Description

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](https://owasp.org/www-community/attacks/xss/#reflected-xss-attacks) vulnerability. This vulnerability is particularly relevant if your Datasette installation includes authenticated features using plugins such as [datasette-auth-passwords](https://datasette.io/plugins/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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.96%

57.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Datasette	Datasette	< 0.56.1

References

https://datasette.io/plugins/datasette-auth-passwordsVendor Advisory
https://github.com/simonw/datasette/issues/1360Issue Tracking, Patch, Third Party Advisory
https://github.com/simonw/datasette/security/advisories/GHSA-xw7c-jx9m-xh5gThird Party Advisory
https://owasp.org/www-community/attacks/xss/#reflected-xss-attacksThird Party Advisory
https://pypi.org/project/datasette/Release Notes, Third Party Advisory
https://datasette.io/plugins/datasette-auth-passwordsVendor Advisory
https://github.com/simonw/datasette/issues/1360Issue Tracking, Patch, Third Party Advisory
https://github.com/simonw/datasette/security/advisories/GHSA-xw7c-jx9m-xh5gThird Party Advisory
https://owasp.org/www-community/attacks/xss/#reflected-xss-attacksThird Party Advisory
https://pypi.org/project/datasette/Release Notes, Third Party Advisory

Timeline

Published: Jun 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32670?

How severe is CVE-2021-32670?

CVE-2021-32670 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32670?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-32670?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST