CVE-2023-42457
plone.rest allows users to use HTTP verbs such as GET, POST, PUT, DELETE, etc. in Plone.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.01%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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).
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.01% probability · 63th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-770
- Affected
- plone/rest
- Source
- security-advisories@github.com
EPSS 1.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2023/09/22/2Mailing List, Third Party Advisory
- https://github.com/plone/plone.rest/commit/43b4a7e86206e237e1de5ca3817ed071575882f7Patch
- https://github.com/plone/plone.rest/commit/77846a9842889b24f35e8bedc2e9d461388d3302Patch
- https://github.com/plone/plone.rest/security/advisories/GHSA-h6rp-mprm-xgcqVendor Advisory
- http://www.openwall.com/lists/oss-security/2023/09/22/2Mailing List, Third Party Advisory
- https://github.com/plone/plone.rest/commit/43b4a7e86206e237e1de5ca3817ed071575882f7Patch
- https://github.com/plone/plone.rest/commit/77846a9842889b24f35e8bedc2e9d461388d3302Patch
- https://github.com/plone/plone.rest/security/advisories/GHSA-h6rp-mprm-xgcqVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.