PT-2021-19942 · Pypi · Flask-Appbuilder

Dpgaspar · Published 2021-09-08 · Updated 2021-09-15 · CVE-2021-32805

Positive Technologies (AI Summary)

CVSS v3.1

7.2

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Flask-AppBuilder versions prior to 3.2.2

Description The issue is an open redirect vulnerability that occurs when using Flask-AppBuilder OAuth. An attacker can share a carefully crafted URL with a trusted domain for an application built with Flask-AppBuilder, which can redirect a user to a malicious site.

Recommendations To resolve this issue, upgrade to Flask-AppBuilder 3.2.2 or above. If upgrading is infeasible, filter HTTP traffic containing ?next={next-site} where the next-site domain is different from the application you are protecting as a workaround.

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2021-32805

GHSA-624F-CQVR-3QW4

PYSEC-2021-359

Affected Products

Flask-Appbuilder

References · 11

• https://github.com/dpgaspar/Flask-AppBuilder/commit/6af28521589599b1dbafd6313256229ee9a4fa74 · Patch
• https://osv.dev/vulnerability/CVE-2021-32805 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-32805 · Security Note
• https://osv.dev/vulnerability/PYSEC-2021-359 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-624f-cqvr-3qw4 · Vendor Advisory
• https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-624f-cqvr-3qw4 · Note
• https://github.com/dpgaspar/Flask-AppBuilder · Note
• https://github.com/dpgaspar/Flask-AppBuilder/releases/tag/v3.3.2 · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/flask-appbuilder/PYSEC-2021-359.yaml · Note
• https://t.me/cibsecurity/28527 · Telegram Post
• https://pypi.org/project/Flask-AppBuilder · Note