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🐍 PyPI
Not in CISA KEV
HIGH severity

Reflected cross-site scripting issue in DatasetteGHSA-xw7c-jx9m-xh5g

HIGH

GHSA-xw7c-jx9m-xh5g is a high-severity (CVSS 7.2) Cross-site Scripting (XSS) vulnerability in datasette. A fix is available for datasette — see the affected versions and patch details below.

Also known asCVE-2021-32670GHSA-gff3-739c-gxfqPYSEC-2021-89
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs62th percentile — riskier than 62% of all scored CVEsHighest risk
0.09%0.55%1.00%1.46%0.6%1.0%May 26Oct 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍datasette

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Impact

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.

Patches

Datasette 0.57 and 0.56.1 both include patches for this issue.

Workarounds

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.

References

For more information

If you have any questions or comments about this advisory:

  • Open a discussion in simonw/datasette
  • Email us at swillison+datasette @ gmail.com

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIdatasetteall versions0.56.1pip install --upgrade 'datasette==0.56.1'

Affected Products

1 product · 1 configurations
Application
datasettedatasette
< 0.56.1
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for datasette, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update datasette to 0.56.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xw7c-jx9m-xh5g is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### Impact 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. ### Patches Datasette 0.57 and 0.56.1 both include patches for this issue. ### Worka
O3 Security · Impact-Aware SCA

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Reflected cross-site scripting issue in Datasette (High 7.2)