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CVE-2021-21337

MediumPublished

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

Published: Mar 8, 2021
Updated: Aug 3, 2024
Assigning CNA: GitHub_M
Evidence observed: Jun 2, 2021

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

8.4%

Low · next 30 days

Percentile: 94.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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".

Sources

Products.PluggableAuthService 2.6.0 - Open RedirectExploit
Piyush Patil · python · Jun 2, 2021

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