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High, CVSS 7.5

DDOS attack on graphql endpoints

CVE-2023-28104GHSA-67g8-c724-8mp3

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (silverstripe/graphql 4.2.3, 4.1.2), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
  • CVE-2023-28104: 1.05% estimated exploitation activity in the next 30 days; percentile 64.46 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

An attacker could use a specially crafted graphql query to execute a Distributed Denial of Service attack (DDOS attack) against a website. This mostly affects websites with publicly exposed and particularly large/complex 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 will likely further mitigate the risk. Upgrade to silverstripe/graphql 4.2.3 or 4.1.2 or above to remedy the vulnerability.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-67g8-c724-8mp3

Agent brief

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# Patch Next advisory brief: CVE-2023-28104

Advisory: DDOS attack on graphql endpoints
IDs: CVE-2023-28104, GHSA-67g8-c724-8mp3
Record: https://patchnext.com/advisories/cve-2023-28104 (revision 1, source checked 26 Oct 2026, 14:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: silverstripe/graphql 4.2.3, 4.1.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist silverstripe/graphql: affected >= 4.1.1, < 4.1.2; >= 4.2.2, < 4.2.3; fixed in 4.1.2, 4.2.3

## Suggested inspection (read-only)
- Packagist silverstripe/graphql: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on silverstripe/graphql.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-67g8-c724-8mp3 (GitHub-reviewed advisory GHSA-67g8-c724-8mp3 lists affected ranges: Packagist silverstripe/graphql >=4.1.1 =4.2.2 <4.2.3)

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