CVE-2021-21337

Description

Products.PluggableAuthService is a pluggable Zope authentication and authorization framework. In Products.PluggableAuthService before version 2.6.0 there is an open redirect vulnerability. A maliciously crafted link to the login form and login functionality could redirect the browser to a different website. The problem has been fixed in version 2.6.1. Depending on how you have installed Products.PluggableAuthService, you should change the buildout version pin to `2.6.1` and re-run the buildout, or if you used `pip` simply do `pip install "Products.PluggableAuthService>=2.6.1".

How to fix CVE-2021-21337

To remediate CVE-2021-21337, upgrade the affected package to a fixed version below.

• —upgrade to 2.6.1 or later
• —upgrade to 7eead067898852ebd3e0f143bc51295928528dfa or later

Is CVE-2021-21337 being exploited?

Low — EPSS is 1.8%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 2.6.1
• from 0, < 7eead067898852ebd3e0f143bc51295928528dfa | from 0, < 2.6.1

CVSS scores

References (8)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-21337
• PATCHgithub.com/zopefoundation/Products.PluggableAuthService
• PATCHpypi.org/project/Products.PluggableAuthService/
• WEBpacketstormsecurity.com/files/162911/Products.PluggableAuthService-2.6.0-Open-Redirect.html