URL Redirection to Untrusted Site ('Open Redirect') in Products.PluggableAuthService
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?
For more information
If you have any questions or comments about this advisory:
- Open an issue in the Products.PluggableAuthService issue tracker
- Email us at security@plone.org
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | products-pluggableauthservice | < 2.6.1 | 2.6.1 |
References
- https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p44j-xrqg-4xrr
- https://pypi.org/project/Products.PluggableAuthService/
- https://github.com/zopefoundation/Products.PluggableAuthService/commit/7eead067898852ebd3e0f143bc51295928528dfa
- 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://github.com/zopefoundation/Products.PluggableAuthService
- https://pypi.org/project/Products.PluggableAuthService
- http://packetstormsecurity.com/files/162911/Products.PluggableAuthService-2.6.0-Open-Redirect.html
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-601- Platform
- Python (PyPI)
- Package
products-pluggableauthservice- Disclosed
- 08.03.2021
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2021-45 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-p44j-xrqg-4xrr - CC BY 4.0
Vulnerability history: products-pluggableauthservice
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 03.2021 05.2021
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 2
Disclosures per year
- 2021: 3
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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URL Redirection to Untrusted Site ('Open Redirect') in Products.PluggableAuthService this entry
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