CVE-2021-21337: URL Redirection to Untrusted Site ('Open Redirect') in Products.PluggableAuthService
First published: Mon Mar 08 2021(Updated: )
### Impact _What kind of vulnerability is it? Who is impacted?_ Open redirect vulnerability - a maliciously crafted link to the login form and login functionality could redirect the browser to a different website. ### Patches _Has the problem been patched? What versions should users upgrade to?_ 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"` ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ There is no workaround. Users are encouraged to upgrade. ### References _Are there any links users can visit to find out more?_ - [GHSA-p44j-xrqg-4xrr](https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p44j-xrqg-4xrr) - [Products.PluggableAuthService on PyPI](https://pypi.org/project/Products.PluggableAuthService/) - [OWASP page on open redirects](https://cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html) ### For more information If you have any questions or comments about this advisory: * Open an issue in the [Products.PluggableAuthService issue tracker](https://github.com/zopefoundation/Products.PluggableAuthService/issues) * Email us at [security@plone.org](mailto:security@plone.org)
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Zope Products.pluggableauthservice | <2.6.1 | |
| pip/Products.PluggableAuthService | <2.6.1 | 2.6.1 |
| <2.6.1 |
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Reference Links
- http://packetstormsecurity.com/files/162911/Products.PluggableAuthService-2.6.0-Open-Redirect.html
- https://github.com/zopefoundation/Products.PluggableAuthService/commit/7eead067898852ebd3e0f143bc51295928528dfa
- https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p44j-xrqg-4xrr
- https://pypi.org/project/Products.PluggableAuthService/
- https://nvd.nist.gov/vuln/detail/CVE-2021-21337
- https://github.com/pypa/advisory-database/tree/main/vulns/products-pluggableauthservice/PYSEC-2021-45.yaml
- https://pypi.org/project/Products.PluggableAuthService
- https://github.com/advisories/GHSA-p44j-xrqg-4xrr (Advisory)
Frequently Asked Questions
What is CVE-2021-21337?
CVE-2021-21337 is an open redirect vulnerability in Products.PluggableAuthService before version 2.6.0.
How does CVE-2021-21337 affect Zope Products.pluggableauthservice?
CVE-2021-21337 affects Zope Products.pluggableauthservice versions up to 2.6.1.
What is the severity level of CVE-2021-21337?
CVE-2021-21337 has a severity level of medium (6.1).
How can I fix the open redirect vulnerability in Products.PluggableAuthService?
To fix the open redirect vulnerability, update Products.PluggableAuthService to version 2.6.1 or higher.
Where can I find more information about CVE-2021-21337?
You can find more information about CVE-2021-21337 at the following references: [1] [2] [3].
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