CVE-2021-21337

Public Exploit
URL Redirection to Untrusted Site ('Open Redirect') in Products.PluggableAuthService

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".

Category

5.7
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 3.74% Top 15%
Third-Party Advisory packetstormsecurity.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory pypi.org
Affected: zopefoundation Products.PluggableAuthService
Published at:
Updated at:

References

Link Tags
https://pypi.org/project/Products.PluggableAuthService/ third party advisory product
https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p44j-xrqg-4xrr third party advisory
https://github.com/zopefoundation/Products.PluggableAuthService/commit/7eead067898852ebd3e0f143bc51295928528dfa third party advisory patch
http://packetstormsecurity.com/files/162911/Products.PluggableAuthService-2.6.0-Open-Redirect.html exploit vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-21337?
CVE-2021-21337 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21337?
To fix CVE-2021-21337, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21337 being actively exploited in the wild?
It is possible that CVE-2021-21337 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21337?
CVE-2021-21337 affects zopefoundation Products.PluggableAuthService.
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