CVE-2021-21336

Name: CVE-2021-21336
Creator: NVD / NIST
Published: 2021-03-08T21:15:16.683+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.50%

Last modified Jun 17, 2026

CVE-2021-21336 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Products.PluggableAuthService is a pluggable Zope authentication and authorization framework. In Products.PluggableAuthService before version 2.6.0 there is an information disclosure vulnerability - everyone can list the names of roles defined in the ZODB Role Manager plugin if the site uses this plugin. EPSS estimates a 1.50% chance of exploitation in the next 30 days.

Description

Products.PluggableAuthService is a pluggable Zope authentication and authorization framework. In Products.PluggableAuthService before version 2.6.0 there is an information disclosure vulnerability - everyone can list the names of roles defined in the ZODB Role Manager plugin if the site uses this plugin. The problem has been fixed in version 2.6.0. Depending on how you have installed Products.PluggableAuthService, you should change the buildout version pin to 2.6.0 and re-run the buildout, or if you used pip simply do `pip install "Products.PluggableAuthService>=2.6.0"`.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.50%

71.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Zope	Products.Pluggableauthservice	< 2.6.0
Plone	Plone	>= 4.3.0, <= 4.3.20
Plone	Plone	>= 5.0, <= 5.2.4

References

http://www.openwall.com/lists/oss-security/2021/05/21/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/22/1Mailing List, Third Party Advisory
https://github.com/zopefoundation/Products.PluggableAuthService/commit/2dad81128250cb2e5d950cddc9d3c0314a80b4bbPatch, Third Party Advisory
https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p75f-g7gx-2r7pThird Party Advisory
https://pypi.org/project/Products.PluggableAuthService/Product, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/21/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/22/1Mailing List, Third Party Advisory
https://github.com/zopefoundation/Products.PluggableAuthService/commit/2dad81128250cb2e5d950cddc9d3c0314a80b4bbPatch, Third Party Advisory
https://github.com/zopefoundation/Products.PluggableAuthService/security/advisories/GHSA-p75f-g7gx-2r7pThird Party Advisory
https://pypi.org/project/Products.PluggableAuthService/Product, Third Party Advisory

Timeline

Published: Mar 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21336?

How severe is CVE-2021-21336?

CVE-2021-21336 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.50% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21336?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21336?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST