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TI-2023-22622 Aliases CVE-2023-42457GHSA-h6rp-mprm-xgcq

plone.rest vulnerable to Denial of Service when ++api++ is used many times

Priority MEDIUM 41CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01013 63rd percentileScored 2026-11-07
Fix Fixed plone.rest (plone): 2.0.1plone.rest (PyPI): 2.0.1, 3.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ploneplone.rest2.0.0a1 to before 2.0.1; = 3.0.02.0.1Patch availableCNA
—plone.rest (PyPI)2.0.0a1 to before 2.0.12.0.1Patch availableGHSA-h6rp-mprm-xgcq
—plone.rest (PyPI)3.0.0 to before 3.0.13.0.1Patch availableGHSA-h6rp-mprm-xgcq
  • plone.rest Vendorplone Affected 2.0.0a1 to before 2.0.1; = 3.0.0 Fixed in 2.0.1 Patch available CNA
  • plone.rest (PyPI) Vendor— Affected 2.0.0a1 to before 2.0.1 Fixed in 2.0.1 Patch available GHSA-h6rp-mprm-xgcq
  • plone.rest (PyPI) Vendor— Affected 3.0.0 to before 3.0.1 Fixed in 3.0.1 Patch available GHSA-h6rp-mprm-xgcq

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:plone:rest:2.0.0:*:*:*:*:*:*:*2.0.0Vulnerableplone
cpe:2.3:a:plone:rest:3.0.0:*:*:*:*:*:*:*3.0.0Vulnerableplone
  • cpe:2.3:a:plone:rest:2.0.0:*:*:*:*:*:*:* Versions 2.0.0 Vulnerable ·plone
  • cpe:2.3:a:plone:rest:3.0.0:*:*:*:*:*:*:* Versions 3.0.0 Vulnerable ·plone

Remediation

  • Fix · CNA plone.rest (plone) Fixed in 2.0.1
  • Fix · GHSA-h6rp-mprm-xgcq plone.rest (PyPI) Fixed in 2.0.1 Advisory →
  • Fix · GHSA-h6rp-mprm-xgcq plone.rest (PyPI) Fixed in 3.0.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-42457
  2. 2026-10-03 Alias added: GHSA-h6rp-mprm-xgcq

References

Patch 2

Advisory 3

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences