CVE-2025-64481 Details
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.
A open redirect vulnerability exists in Datasette, an open-source tool for data exploration and publishing, in versions prior to 0.65.2 and 1.0a20. The vulnerability allows redirects from paths with a double slash to be misinterpreted, leading to unintended destinations. For example, a path like '//example.com/foo/bar/' (with a trailing slash) would redirect to 'https://example.com/foo/bar'. This issue has been observed on production servers, including instances on Heroku.
Users can update to Datasette version 0.65.2 or 1.0a21, both of which include the necessary fix. If an immediate update is not possible, and Datasette is behind a proxy, configure the proxy to replace double slashes with single slashes in incoming URLs.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 7, 2025CISA-ADP
Assessed Nov 13, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/simonw/datasette/commit/f257ca6edb64848c3b04b54d41e347c54fe57c05 | [email protected] | Source CodeVendor |
| https://github.com/simonw/datasette/issues/2429 | [email protected] | Issue TrackingTechnical DescriptionVendor |
| https://github.com/simonw/datasette/security/advisories/GHSA-w832-gg5g-x44m | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-601 | URL Redirection to Untrusted Site ('Open Redirect') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| simonw/datasette | < 0.65.2 (semver) < 1.0a20 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Dec 26, 2025 | CVE Modified | [email protected] |
| Nov 7, 2025 | New CVE Received | [email protected] |