CVE-2021-32805

Description

Flask-AppBuilder is an application development framework, built on top of Flask. In affected versions if using Flask-AppBuilder OAuth, an attacker can share a carefully crafted URL with a trusted domain for an application built with Flask-AppBuilder, this URL can redirect a user to a malicious site. This is an open redirect vulnerability. To resolve this issue upgrade to Flask-AppBuilder 3.2.2 or above. If upgrading is infeasible users may filter HTTP traffic containing `?next={next-site}` where the `next-site` domain is different from the application you are protecting as a workaround.

How to fix CVE-2021-32805

To remediate CVE-2021-32805, upgrade the affected package to a fixed version below.

• —upgrade to 3.3.2 or later
• —upgrade to 6af28521589599b1dbafd6313256229ee9a4fa74 or later

Is CVE-2021-32805 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 3.3.2
• from 0, < 6af28521589599b1dbafd6313256229ee9a4fa74 | from 0, < 3.3.2

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-32805
• PATCHgithub.com/dpgaspar/Flask-AppBuilder
• WEBgithub.com/dpgaspar/Flask-AppBuilder/commit/6af28521589599b1dbafd6313256229ee9a4fa74
• WEBgithub.com/dpgaspar/Flask-AppBuilder/releases/tag/v3.3.2