---
id: CVE-2026-54717
title: Silverstripe CMS is an open source content management system
summary: >-
  Silverstripe CMS is an open source content management system. Prior to 6.2.1,
  page breadcrumbs in the CMS are vulnerable to cross-site scripting when viewed
  using the page list view, because page titles are rendered into the breadcrumb
  t…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: silverstripe
product: silverstripe/cms
affected:
  - silverstripe/cms < 6.2.1
patched:
  - silverstripe/cms 6.2.1
published: '2026-08-06'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:51:43.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54717'
references:
  - url: >-
      https://github.com/silverstripe/silverstripe-cms/commit/62f9912baa18c80304f3fa8b6eca71bb5dc2d21e
    label: security-advisories@github.com
  - url: 'https://github.com/silverstripe/silverstripe-cms/pull/3175'
    label: security-advisories@github.com
  - url: 'https://github.com/silverstripe/silverstripe-cms/releases/tag/6.2.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/silverstripe/silverstripe-cms/security/advisories/GHSA-w3cp-g2pf-65wh
    label: security-advisories@github.com
  - url: >-
      https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/cms/CVE-2026-54717.yaml
  - url: 'https://www.silverstripe.org/download/security-releases/cve-2026-54717'
  - url: 'https://github.com/advisories/GHSA-w3cp-g2pf-65wh'
tags:
  - nvd
  - ghsa
  - composer
epss: 0.00338
epssPercentile: 0.24526
aliases:
  - GHSA-w3cp-g2pf-65wh
ecosystem: composer
ingestedAt: '2026-08-06T21:04:22.296Z'
---

## Overview

Silverstripe CMS is an open source content management system. Prior to 6.2.1, page breadcrumbs in the CMS are vulnerable to cross-site scripting when viewed using the page list view, because page titles are rendered into the breadcrumb trail without being escaped. This issue is fixed in 6.2.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-54717)

Affected packages:

- `silverstripe/cms < 6.2.1`

Patched in:

- `silverstripe/cms 6.2.1`

Source: https://github.com/advisories/GHSA-w3cp-g2pf-65wh