{"id":"CVE-2023-36814","aliases":["GHSA-4hpj-8rhv-9x87","PYSEC-2023-113"],"url":"https://o3.security/vulnerability/CVE-2023-36814","summary":"zopefoundation's Products.CMFCore vulnerable to unauthenticated denial of service and crash via unchecked use of input with Python's marshal module","details":"### Impact\nThe 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.\n\n### Patches\nThe code has been fixed in `Products.CMFCore` version 3.2.\n\n### Workarounds\nUsers can make the affected `decodeFolderFilter` method unreachable by editing the `PortalFolder.py` module in `Products.CMFCore` by hand and then restarting Zope. Go to line 233 of `PortalFolder.py` and remove both the `@security.public` decorator for `decodeFolderFilter` as well as the method's entire docstring. This is safe because the method is not actually used by current code.\n\n### References\n- Products.CMFCore security advisory [GHSA-4hpj-8rhv-9x87](https://github.com/zopefoundation/Products.CMFCore/security/advisories/GHSA-4hpj-8rhv-9x87)\n\n### Credits\nThanks go to Nicolas VERDIER from onepoint.\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n- Open an issue in the [Products.CMFCore issue tracker](https://github.com/zopefoundation/Products.CMFCore/issues)\n- Email us at [security@plone.org](mailto:security@plone.org)","published":"2023-07-03T16:48:36.149Z","modified":"2026-08-12T03:51:31.885234777Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.00723,"percentile":0.50899,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"products-cmfcore","fixedVersion":"3.2"},{"ecosystem":"PyPI","name":"products-cmfcore","fixedVersion":"2.7.1"}],"fix":{"url":"https://github.com/zopefoundation/Products.CMFCore/commit/40f03f43a60f28ca9485c8ef429efef729be54e5","label":"zopefoundation/Products.CMFCore@40f03f4"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/36xxx/CVE-2023-36814.json"},{"type":"ADVISORY","url":"https://github.com/zopefoundation/Products.CMFCore/security/advisories/GHSA-4hpj-8rhv-9x87"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36814"},{"type":"FIX","url":"https://github.com/zopefoundation/Products.CMFCore/commit/40f03f43a60f28ca9485c8ef429efef729be54e5"},{"type":"WEB","url":"https://github.com/zopefoundation/Products.CMFCore/commit/c1847a9042abe7965271fa73762dfe091b576de"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/products-cmfcore/PYSEC-2023-113.yaml"},{"type":"PACKAGE","url":"https://github.com/zopefoundation/Products.CMFCore"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:31.885234777Z"}}