Vulnerability · Published Nov 7, 2025 · Assigned by GitHub_M

CVE-2025-64481Open redirect endpoint in Datasette

Low 2.7

In plain English

A low-severity open redirect in datasette from simonw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)2.7Low

Exploit odds (30 days)0.4%top 64.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Datasette is an open source multi-tool for exploring and publishing data. In versions 0.65.1 and below and 1.0a0 through 1.0a19, deployed instances of Datasette include an open redirect vulnerability. Hits to the path //example.com/foo/bar/ (the trailing slash is required) will redirect the user to https://example.com/foo/bar. This problem has been patched in both Datasette 0.65.2 and 1.0a21. To workaround this issue, if Datasette is running behind a proxy, that proxy could be configured to replace // with / in incoming request URLs.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	datasette	0.65.2	GHSA-w832-gg5g-x44m
PyPI	datasette	1.0a21	GHSA-w832-gg5g-x44m
PyPI	datasette	no fix listed	PYSEC-2025-73

Affected products (as reported)

Vendor	Product	Versions
simonw	datasette	< 0.65.2>= 1.0a0, < 1.0a20

Weakness: CWE-601 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

References

https://github.com/simonw/datasette/security/advisories/GHSA-w832-gg5g-x44m x_refsource_CONFIRM
https://github.com/simonw/datasette/issues/2429 x_refsource_MISC
https://github.com/simonw/datasette/commit/f257ca6edb64848c3b04b54d41e347c54fe57c05 x_refsource_MISC