CVE catalog

CVE-2020-25032

python-flask-cors affected and fixed versions

[CVE catalog]

An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
Source
[NVD] · [CVE record]
EPSS
4.02% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / releasePackageVersionStatusSource
Debiantrixiepython-flask-cors3.0.9-1FixedDistribution-reported fixed boundary[CVE-2020-25032]
Debiantrixiepython-flask-cors6.0.1-1Fixed[CVE-2020-25032]
Debiansidpython-flask-cors3.0.9-1FixedDistribution-reported fixed boundary[CVE-2020-25032]
Debiansidpython-flask-cors6.0.5-1Fixed[CVE-2020-25032]
Debianforkypython-flask-cors3.0.9-1FixedDistribution-reported fixed boundary[CVE-2020-25032]
Debianforkypython-flask-cors6.0.5-1Fixed[CVE-2020-25032]
Debianbookwormpython-flask-cors3.0.10-2+deb12u1Fixed[CVE-2020-25032]
Debianbookwormpython-flask-cors3.0.9-1FixedDistribution-reported fixed boundary[CVE-2020-25032]

Showing 8 fix observations. All 17 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence
Distribution / releasePackageVersionStatusSource
Debianbookwormpython-flask-cors3.0.10-2+deb12u1Fixed[CVE-2020-25032]
Debianbookwormpython-flask-cors3.0.9-1FixedDistribution-reported fixed boundary[CVE-2020-25032]
Debianforkypython-flask-cors3.0.9-1FixedDistribution-reported fixed boundary[CVE-2020-25032]
Debianforkypython-flask-cors6.0.5-1Fixed[CVE-2020-25032]
Debiansidpython-flask-cors3.0.9-1FixedDistribution-reported fixed boundary[CVE-2020-25032]
Debiansidpython-flask-cors6.0.5-1Fixed[CVE-2020-25032]
Debiantrixiepython-flask-cors3.0.9-1FixedDistribution-reported fixed boundary[CVE-2020-25032]
Debiantrixiepython-flask-cors6.0.1-1Fixed[CVE-2020-25032]
Opensuseleap 15.1python-Flask-Cors3.0.8-lp152.2.3.1UnknownSource applicability is not established[OPENSUSE-SU-2020:1393-1]
Opensuseleap 15.2python-Flask-Cors3.0.8-lp152.2.3.1UnknownSource applicability is not established[OPENSUSE-SU-2020:1393-1]
Opensusetumbleweedpython-Flask-Cors3.0.10-1.3UnknownSource applicability is not established[OPENSUSE-SU-2024:11206-1]
Opensusetumbleweedpython-Flask-Cors4.0.0-1.3UnknownSource applicability is not established[OPENSUSE-SU-2024:14129-1]
Opensusetumbleweedpython-Flask-Cors6.0.2-1.2UnknownSource applicability is not established[OPENSUSE-SU-2026:11990-1]
Susepackage hub 15 sp1python-Flask-Cors3.0.7-bp151.2.3.1UnknownSource applicability is not established[OPENSUSE-SU-2020:1415-1]
Susepackage hub 15 sp2python-Flask-Cors3.0.8-bp152.2.3.1UnknownSource applicability is not established[OPENSUSE-SU-2020:1446-1][OPENSUSE-SU-2020:1423-1]
Ubuntu20.04python-flask-cors3.0.8-2UnknownSource applicability is not established[USN-6019-1][UBUNTU-CVE-2020-25032]
Ubuntu20.04python-flask-cors3.0.8-2ubuntu0.1UnknownSource applicability is not established[USN-6019-1][UBUNTU-CVE-2020-25032]
Original provider fields
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      "version": "6.0.1-1"
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}

[Debian bug #969362]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [python3-flask-cors]Unknown

    Source package: [python-flask-cors]

    Details (2)

    • 3.0.10-2+deb12u1 · all · bookworm

      Fixed · Fixed: 3.0.9-1

      dsa · python-flask-cors · debian · bookworm; dsa · python-flask-cors · debian · 12

    • 3.0.10-2+deb12u1 · all · bookworm

      Fixed · Fixed: 3.0.9-1

      dsa · python-flask-cors · debian · bookworm; dsa · python-flask-cors · debian · 12

[Debian 13 (Trixie)]

  • [python3-flask-cors]Unknown

    Source package: [python-flask-cors]

    Details (2)

    • 6.0.1-1 · all · trixie

      Fixed · Fixed: 3.0.9-1

      dsa · python-flask-cors · debian · 13

    • 6.0.1-1 · all · trixie

      Fixed · Fixed: 3.0.9-1

      dsa · python-flask-cors · debian · 13

[openSUSE Tumbleweed]

  • [python313-Flask-Cors]Unknown

    Source package: [python-Flask-Cors]

    Details (1)

    • 6.0.2-1.2 · noarch · tumbleweed

      Unknown · Fixed: 3.0.10-1.3, 4.0.0-1.3, 6.0.2-1.2

      Version impact unknown

      dsa · python-Flask-Cors · opensuse · tumbleweed

  • [python314-Flask-Cors]Unknown

    Source package: [python-Flask-Cors]

    Details (1)

    • 6.0.2-1.2 · noarch · tumbleweed

      Unknown · Fixed: 3.0.10-1.3, 4.0.0-1.3, 6.0.2-1.2

      Version impact unknown

      dsa · python-Flask-Cors · opensuse · tumbleweed

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]