What is CVE-2023-40180?

CVE-2023-40180 is a high-severity vulnerability in Silverstripe Graphql, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-10-16.

How severe is CVE-2023-40180?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Silverstripe Graphql

CVE-2023-40180

silverstripe-graphql is a package which serves Silverstripe data in GraphQL representations. An attacker could use a recursive graphql query to execute a Distributed Denial of Service attack (DDOS attack) against a website. This mostly affects websites with publicly exposed graphql schemas. If your Silverstripe CMS project does not expose a public facing graphql schema, a user account is required to trigger the DDOS attack. If your site is hosted behind a content delivery network (CDN), such as Imperva or CloudFlare, this may further mitigate the risk. This issue has been addressed in versions 3.8.2, 4.1.3, 4.2.5, 4.3.4, and 5.0.3. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Vulnerability class: DoS (Denial of Service)

Published 2023-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Silverstripe Graphql
Silverstripe Silverstripe-Graphql — versions >= 3.0.0, < 3.8.2, >= 4.0.0, < 4.1.3, >= 4.2.0, < 4.2.5

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

github.com/silverstripe/silverstripe-graphql/security/advisories/GHSA-v23w-pppm… (Third Party Advisory)
github.com/silverstripe/silverstripe-graphql/commit/f6d5976ec4608e51184b0db1ee5… (Patch)
docs.silverstripe.org/en/developer_guides/graphql/security_and_best_practices/r… (Mitigation)
github.com/silverstripe/silverstripe-graphql/tree/3.8 (Third Party Advisory)
www.silverstripe.org/download/security-releases/CVE-2023-40180 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-40180?: CVE-2023-40180 is a high-severity vulnerability in Silverstripe Graphql, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-10-16.
How severe is CVE-2023-40180?: High severity. CVSS v3 base score is 7.5 out of 10.