CVE-2021-32811
No exploitation reported by the sources we read.
- Published2021-08-02
- Fixed in5.3 · 4.6.3
- WeaknessCWE-1321 · CWE-915
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Zope is an open-source web application server. Zope versions prior to versions 4.6.3 and 5.3 have a remote code execution security issue. In order to be affected, one must use Python 3 for one's Zope deployment, run Zope 4 below version 4.6.3 or Zope 5 below version 5.3, and have the optional `Products.PythonScripts` add-on package installed. By default, one must have the admin-level Zope "Manager" role to add or edit Script (Python) objects through the web. Only sites that allow untrusted users to add/edit these scripts through the web are at risk. Zope releases 4.6.3 and 5.3 are not vulnerable. As a workaround, a site administrator can restrict adding/editing Script (Python) objects through the web using the standard Zope user/role permission mechanisms. Untrusted users should not be assigned the Zope Manager role and adding/editing these scripts through the web should be restricted to trusted users only. This is the default configuration in Zope.
Timeline
dates in UTC- 2021-08-0222:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-32811?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-32811?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.x | ≥ 5.0, < 5.3 | 5.3 | NVD |
| 4.x | ≥ 4.0, < 4.6.3 | 4.6.3 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.x | ≥ 5.0, < 5.2 | 5.2 | NVD |
| 4.x | ≥ 4.0, < 4.3 | 4.3 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Zope to 5.3 · 4.6.3
Advisories and patches
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-08-02
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-32811?
Is CVE-2021-32811 actively exploited?
What is the CVSS score for CVE-2021-32811?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.