CVE-2021-23401 - OpenCVE

This affects all versions of package Flask-User. When using the make_safe_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 or \\\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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact None

AV:N/AC:M/Au:N/C:P/I:P/A:N

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Flask-user Project	Flask-user

Configuration 1 [-]

cpe:2.3:a:flask-user_project:flask-user:*:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://github.com/lingthio/Flask-User
https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py
https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188

History

No history.

MITRE

Status: PUBLISHED

Assigner: snyk

Published: 2021-07-05T10:25:11.545785Z

Updated: 2024-09-16T17:15:15.113Z

Reserved: 2021-01-08T00:00:00

Link: CVE-2021-23401

Vulnrichment

No data.

NVD

Status : Analyzed

Published: 2021-07-05T11:15:07.670

Modified: 2021-07-08T18:08:12.190

Link: CVE-2021-23401

Redhat

No data.

{"containers": {"cna": {"affected": [{"product": "Flask-User", "vendor": "n/a", "versions": [{"lessThan": "unspecified", "status": "affected", "version": "0", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "Noam Moshe of Claroty"}], "datePublic": "2021-07-05T00:00:00", "descriptions": [{"lang": "en", "value": "This affects all versions of package Flask-User. When using the make_safe_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 or \\\\\\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."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "exploitCodeMaturity": "PROOF_OF_CONCEPT", "integrityImpact": "LOW", "privilegesRequired": "NONE", "remediationLevel": "UNAVAILABLE", "reportConfidence": "CONFIRMED", "scope": "UNCHANGED", "temporalScore": 5.1, "temporalSeverity": "MEDIUM", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:U/RC:C", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"description": "Open Redirect", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-07-05T10:25:11", "orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730", "shortName": "snyk"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/lingthio/Flask-User"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py"}], "title": "Open Redirect", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "report@snyk.io", "DATE_PUBLIC": "2021-07-05T10:20:49.366771Z", "ID": "CVE-2021-23401", "STATE": "PUBLIC", "TITLE": "Open Redirect"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Flask-User", "version": {"version_data": [{"version_affected": ">=", "version_value": "0"}]}}]}, "vendor_name": "n/a"}]}}, "credit": [{"lang": "eng", "value": "Noam Moshe of Claroty"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "This affects all versions of package Flask-User. When using the make_safe_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 or \\\\\\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."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:U/RC:C", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Open Redirect"}]}]}, "references": {"reference_data": [{"name": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188", "refsource": "MISC", "url": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188"}, {"name": "https://github.com/lingthio/Flask-User", "refsource": "MISC", "url": "https://github.com/lingthio/Flask-User"}, {"name": "https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py", "refsource": "MISC", "url": "https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T19:05:55.891Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/lingthio/Flask-User"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py"}]}]}, "cveMetadata": {"assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730", "assignerShortName": "snyk", "cveId": "CVE-2021-23401", "datePublished": "2021-07-05T10:25:11.545785Z", "dateReserved": "2021-01-08T00:00:00", "dateUpdated": "2024-09-16T17:15:15.113Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:flask-user_project:flask-user:*:*:*:*:*:*:*:*", "matchCriteriaId": "D3595F3F-8222-4028-AD86-88BAF66AB779", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "This affects all versions of package Flask-User. When using the make_safe_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 or \\\\\\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."}, {"lang": "es", "value": "Esto afecta a todas las versiones del paquete Flask-User. Cuando se usa la funci\u00f3n make_safe_url, es posible omitir la comprobaci\u00f3n de la URL y redirigir a un usuario a una URL arbitraria al proporcionar m\u00faltiples barras invertidas, tal y como /////evil.com/path o \\\\\\\\evil.com/path. Esta vulnerabilidad es s\u00f3lo explotable si un servidor WSGI alternativo que no sea Werkzeug es usado, o es modificado el comportamiento predeterminado de Werkzeug usando \"autocorrect_location_header=False"}], "id": "CVE-2021-23401", "lastModified": "2021-07-08T18:08:12.190", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "report@snyk.io", "type": "Secondary"}]}, "published": "2021-07-05T11:15:07.670", "references": [{"source": "report@snyk.io", "tags": ["Product", "Third Party Advisory"], "url": "https://github.com/lingthio/Flask-User"}, {"source": "report@snyk.io", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py"}, {"source": "report@snyk.io", "tags": ["Third Party Advisory"], "url": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188"}], "sourceIdentifier": "report@snyk.io", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "nvd@nist.gov", "type": "Primary"}]}