{"id":"CVE-2023-36814","aliases":["GHSA-4hpj-8rhv-9x87","PYSEC-2023-113"],"title":"Products.CMFCore unauthenticated denial of service and crash via unchecked use of input with Python's marshal module","summary":"Products.CMFCore unauthenticated denial of service and crash via unchecked use of input with Python's marshal module","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","vendor":"products-cmfcore","product":"products-cmfcore","ecosystem":"pip","affected":["products-cmfcore >= 3.0, < 3.2","products-cmfcore < 2.7.1"],"patched":["products-cmfcore 3.2","products-cmfcore 2.7.1"],"published":"2023-07-05","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:08.494348851Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-4hpj-8rhv-9x87","references":[{"url":"https://github.com/zopefoundation/Products.CMFCore/security/advisories/GHSA-4hpj-8rhv-9x87"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36814"},{"url":"https://github.com/zopefoundation/Products.CMFCore/commit/40f03f43a60f28ca9485c8ef429efef729be54e5"},{"url":"https://github.com/zopefoundation/Products.CMFCore/commit/c1847a9042abe7965271fa73762dfe091b576de"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/products-cmfcore/PYSEC-2023-113.yaml"},{"url":"https://github.com/zopefoundation/Products.CMFCore"}],"tags":["osv","pip"],"epss":0.00723,"epssPercentile":0.52558,"ingestedAt":"2026-09-12T03:13:01.653Z","slug":"CVE-2023-36814","body":"## Overview\n\n### 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)\n\n## Affected packages\n\n- `products-cmfcore >= 3.0, < 3.2`\n- `products-cmfcore < 2.7.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `products-cmfcore 3.2`\n- `products-cmfcore 2.7.1`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}