What’s Vulnerable › Vulnerabilities

CVE-2023-36814: zopefoundation's Products.CMFCore vulnerable to unauthenticated denial of service and crash via unchecked use of input with Python's marshal module

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-07-03 · updated 2026-06-17
• Weakness: CWE-770

Description

Products.CMFCore are the key framework services for the Zope Content Management Framework (CMF). The use of Python's marshal module to handle unchecked input in a public method on `PortalFolder` objects can lead to an unauthenticated denial of service and crash situation. The code in question is exposed by all portal software built on top of `Products.CMFCore`, such as Plone. All deployments are vulnerable. The code has been fixed in `Products.CMFCore` version 3.2.

Affected products

• zopefoundation Products.CMFCore: before 3.2 — fixed in 3.2

How to fix

Upgrade to a fixed version: zopefoundation Products.CMFCore 3.2. Check the vendor advisory for mitigations.

References

• https://github.com/zopefoundation/Products.CMFCore/commit/40f03f43a60f28ca9485c8ef429efef729be54e5
• https://github.com/zopefoundation/Products.CMFCore/security/advisories/GHSA-4hpj-8rhv-9x87
• https://github.com/zopefoundation/Products.CMFCore/commit/40f03f43a60f28ca9485c8ef429efef729be54e5
• https://github.com/zopefoundation/Products.CMFCore/security/advisories/GHSA-4hpj-8rhv-9x87

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