CVE-2021-32674Network attack vector

Remote code execution via unchecked TAL traversal

Published Jun 8, 2021 · Updated Aug 3, 2024

Remote code execution in Zope before 4.6.1 and Zope 5.0.0 through 5.2.0 allows remote authenticated users to run code via TAL expressions. The Page Templates traversal helpers pass TAL path elements to traversePathElement without applying Zope security-policy validation, exposing indirectly reachable unsafe Python modules. Exploitation requires permission to add or edit Page Templates through the web; the default Manager-only configuration does not expose the flaw to untrusted users.

CVSS severity8.7
High
EPSS probability1.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Zope before 4.6.1 and Zope 5.0.0 through 5.2.0 allows remote authenticated users to run code via TAL expressions. The Page Templates traversal helpers pass TAL path elements to traversePathElement without applying Zope security-policy validation, exposing indirectly reachable unsafe Python modules. Exploitation requires permission to add or edit Page Templates through the web; the default Manager-only configuration does not expose the flaw to untrusted users.

The record

CVE
CVE-2021-32674
Published
Jun 8, 2021
Updated
Aug 3, 2024
Vendor
Zope Foundation
Product
Zope
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.6.1
  2. Affected versionversion=>= 5.0.0, < 5.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zope Foundation · Zopeversion=< 4.6.1; version=>= 5.0.0, < 5.2.1

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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