Summary
Open redirect endpoint in Datasette
Workarounds
If Datasette is running behind a proxy that proxy could be configured to replace // with / in incoming request URLs.
Impact
Deployed instances of Datasette prior to 0.65.2 and 1.0a21 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.
Untrusted input controls a URL used for redirection, which can forward users to attacker-controlled sites. Typical impact: phishing and credential harvesting via a trusted domain.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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This problem has been patched in both Datasette 0.65.2 and 1.0a21.
Frequently Asked Questions
- What is CVE-2025-64481? CVE-2025-64481 is a low-severity open redirect vulnerability in datasette (pip), affecting versions < 0.65.2. It is fixed in 0.65.2, 1.0a21. Untrusted input controls a URL used for redirection, which can forward users to attacker-controlled sites.
- Which versions of datasette are affected by CVE-2025-64481? datasette (pip) versions < 0.65.2 is affected.
- Is there a fix for CVE-2025-64481? Yes. CVE-2025-64481 is fixed in 0.65.2, 1.0a21. Upgrade to this version or later.
- Is CVE-2025-64481 exploitable, and should I be worried? Whether CVE-2025-64481 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2025-64481 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2025-64481?
- Upgrade
datasetteto 0.65.2 or later - Upgrade
datasetteto 1.0a21 or later
- Upgrade