{"id":"CVE-2023-42457","aliases":["GHSA-h6rp-mprm-xgcq","PYSEC-2023-178"],"url":"https://o3.security/vulnerability/CVE-2023-42457","summary":"plone.rest vulnerable to Denial of Service when ++api++ is used many times","details":"plone.rest allows users to use HTTP verbs such as GET, POST, PUT, DELETE, etc. in Plone. Starting in the 2.x branch and prior to versions 2.0.1 and 3.0.1, when the `++api++` traverser is accidentally used multiple times in a url, handling it takes increasingly longer, making the server less responsive. Patches are available in `plone.rest` 2.0.1 and 3.0.1.  Series 1.x is not affected. As a workaround, one may redirect `/++api++/++api++` to `/++api++` in one's frontend web server (nginx, Apache).","published":"2023-09-21T14:49:32.123Z","modified":"2026-07-15T02:09:20.465123244Z","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":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"plone-rest","fixedVersion":"2.0.1"},{"ecosystem":"PyPI","name":"plone-rest","fixedVersion":"3.0.1"}],"fix":{"url":"https://github.com/plone/plone.rest/commit/43b4a7e86206e237e1de5ca3817ed071575882f7","label":"plone/plone.rest@43b4a7e"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/09/22/2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42457.json"},{"type":"ADVISORY","url":"https://github.com/plone/plone.rest/security/advisories/GHSA-h6rp-mprm-xgcq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-42457"},{"type":"FIX","url":"https://github.com/plone/plone.rest/commit/43b4a7e86206e237e1de5ca3817ed071575882f7"},{"type":"FIX","url":"https://github.com/plone/plone.rest/commit/77846a9842889b24f35e8bedc2e9d461388d3302"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T02:09:20.465123244Z"}}