Zope is an open-source web application server. This advisory extends the previous advisory at https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 with additional cases of TA
Zope is an open-source web application server. This advisory extends the previous advisory at https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 with additional cases of TAL expression traversal vulnerabilities. Most Python modules are not available for using in TAL expressions that you can add through-the-web, for example in Zope Page Templates. This restriction avoids file system access, for example via the 'os' module. But some of the untrusted modules are available indirectly through Python modules that are available for direct use. By default, you need to have the Manager role to add or edit Zope Page Templates through the web. Only sites that allow untrusted users to add/edit Zope Page Templates through the web are at risk. The problem has been fixed in Zope 5.21 and 4.6.1. The workaround is the same as for https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36: A site administrator can restrict adding/editing Zope Page Templates through the web using the standard Zope user/role permission mechanisms. Untrusted users should not be assigned the Zope Manager role and adding/editing Zope Page Templates through the web should be restricted to trusted users only.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | zope | >= 4.0, < 4.6.1, >= 5.0, < 5.2.1 | 4.6.1, 5.2.1 |
References
- https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36
- https://github.com/zopefoundation/Zope/security/advisories/GHSA-rpcg-f9q6-2mq6
- https://nvd.nist.gov/vuln/detail/CVE-2021-32674
- https://github.com/zopefoundation/Zope/commit/1d897910139e2c0b11984fc9b78c1da1365bec21
- https://github.com/zopefoundation/Zope
- https://pypi.org/project/Zope
- https://github.com/advisories/GHSA-5vq5-pg3r-9ph3
- https://github.com/pypa/advisory-database/tree/main/vulns/zope/PYSEC-2021-104.yaml
- https://pypi.org/project/Zope/
- https://github.com/advisories/GHSA-rpcg-f9q6-2mq6
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-12, CWE-22- Platform
- Python (PyPI)
- Package
zope- Disclosed
- 08.06.2021
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - GHSA-5vq5-pg3r-9ph3 - CC BY 4.0
OSV / GitHub Advisory Database - GHSA-rpcg-f9q6-2mq6 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2021-104 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: zope
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
- 17
- First → latest
- 05.2021 11.2024
- Without a fix
- 4
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 8
- Medium 6
- Low 2
Disclosures per year
- 2021: 4
- 2022: 9
- 2023: 3
- 2024: 1
- 2025: 0
- 2026: 0
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Zope is an open-source web application server. This advisory extends the previous advisory at https://github.com/zopefoundation/Zope/security/advisories/GHSA-5pr9-v234-jw36 with additional cases of TA this entry
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