GHSA-xw7c-jx9m-xh5g Reflected cross-site scripting issue in Datasette

• PyPI datasette: < 0.56.1 → fixed in 0.56.1

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 • OWASP guide to reflected cross-site scripting • Datasette issue #1360 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`