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CVE-2025-64481

Open redirect endpoint in Datasette

2.7 LowFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

0.41%Up 0.4 points since Nov 8, 2025
90%50%10%1%

What each source reports

CVE List Score used 2.7

Open redirect endpoint in Datasette

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.

Record
CVE-2025-64481
CVSS 4.0
2.7 LowCVSS: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
Weakness
CWE-601
Updated
2026-11-02
EUVDEUVD-2025-38040 2.7

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.

Record
EUVD-2025-38040
CVSS 4.0
2.7 LowCVSS: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
Updated
2026-11-02
GitHub AdvisoriesGHSA-w832-gg5g-x44m 2.7

Open redirect endpoint in Datasette

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.

Patches

This problem has been patched in both Datasette 0.65.2 and 1.0a21.

Workarounds

If Datasette is running behind a proxy that proxy could be configured to replace // with / in incoming request URLs.

Record
GHSA-w832-gg5g-x44m
CVSS 4.0
2.7 LowCVSS: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
Weakness
CWE-601
Updated
2026-11-02
NVD 2.7

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.

Record
CVE-2025-64481
CVSS 4.0
2.7 LowCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-601
Updated
2026-11-02
OSV 2.7

Open redirect endpoint in Datasette

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.

Record
CVE-2025-64481
CVSS 4.0
2.7 LowCVSS: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
Weakness
CWE-601
Updated
2026-11-02
OSVGHSA-w832-gg5g-x44m 2.7

Open redirect endpoint in Datasette

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.

Patches

This problem has been patched in both Datasette 0.65.2 and 1.0a21.

Workarounds

If Datasette is running behind a proxy that proxy could be configured to replace // with / in incoming request URLs.

Record
GHSA-w832-gg5g-x44m
CVSS 4.0
2.7 LowCVSS: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
Weakness
CWE-601
Updated
2026-11-02
OSVPYSEC-2025-73 2.7

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.

Record
PYSEC-2025-73
CVSS 4.0
2.7 LowCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
datasette
PyPI
before 0.65.2
0.65.2
datasette
PyPI
1.0a0 up to 1.0a20
1.0a20
datasette
PyPI
before 0.65.2, plus listed versions
0.100.110.120.130.14
Show 45 moreShow less
0.150.160.170.180.190.200.210.220.22.10.230.23.10.23.20.240.250.25.10.25.20.260.26.10.26.20.270.27.10.280.290.29.10.29.20.29.30.300.30.10.30.20.310.31.10.31.20.320.330.340.350.360.370.37.10.380.390.400.410.420.43
0.65.2
datasette
PyPI
1.0a0 up to 1.0a21, plus listed versions
1.0a11.0a101.0a111.0a121.0a13
Show 15 moreShow less
1.0a141.0a151.0a161.0a171.0a181.0a191.0a21.0a201.0a31.0a41.0a51.0a61.0a71.0a81.0a9
1.0a21
datasette
PyPI
Not stated
Not evaluated

Not evaluated means the source gave git commits or a range we can't read, so we can't tell which releases are affected. A fixed version beside it is the source’s own claim.

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-64481 is a low vulnerability (CVSS 2.7) in Simonw Datasette, published November 6, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. Fixed in datasette 0.65.2.

References

This page doesn't list everything

Left out here: 87 versions. The JSON record has them.

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