CVE-2021-21337
5.7 · MEDIUMOverview
CVE-2021-21337 is a medium-severity vulnerability affecting zope products.pluggableauthservice. It was published on March 8, 2021 and has a CVSS 3.1 base score of 5.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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".
Remediation
Check the references section for vendor advisories and patches from zope. Update products.pluggableauthservice to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| zope | products.pluggableauthservice | >= 0, < 2.6.1 | Affected |
References
Frequently Asked Questions
What is CVE-2021-21337?
CVE-2021-21337 is a medium-severity vulnerability affecting zope products.pluggableauthservice. It was published on March 8, 2021 and has a CVSS 3.1 base score of 5.7 (MEDIUM).
How severe is CVE-2021-21337?
This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-21337?
Check the references section for vendor advisories and patches from zope. Update products.pluggableauthservice to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-21337?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21337 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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