Moderate severityNVD Advisory· Published Jun 10, 2021· Updated Sep 16, 2024
Open Redirect
CVE-2021-23393
Description
This affects the package Flask-Unchained before 0.9.0. When using the the _validate_redirect_url function, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as \\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using 'autocorrect_location_header=False.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
Flask-UnchainedPyPI | < 0.9.0 | 0.9.0 |
Affected products
2- Flask-Unchained/Flask-Unchaineddescription
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-pjc4-3w99-j7v4ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-23393ghsaADVISORY
- github.com/briancappello/flask-unchained/commit/2bfeedf1bc31df851cab8c66df0c432b10406aadghsaWEB
- github.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40ghsax_refsource_MISCWEB
- github.com/pypa/advisory-database/tree/main/vulns/flask-unchained/PYSEC-2021-96.yamlghsaWEB
- snyk.io/vuln/SNYK-PYTHON-FLASKUNCHAINED-1293189ghsax_refsource_MISCWEB
News mentions
0No linked articles in our index yet.