CVE-2026-54717: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in silverstripe silverstripe-cms
Silverstripe CMS versions prior to 6.2.1 have a cross-site scripting (XSS) vulnerability in the page breadcrumbs feature within the CMS page list view. This occurs because page titles are rendered into the breadcrumb trail without proper escaping. The vulnerability is fixed in version 6.2.1.
AI Analysis
Technical Summary
CVE-2026-54717 is a cross-site scripting vulnerability in Silverstripe CMS affecting versions before 6.2.1. The issue arises from improper neutralization of input during web page generation (CWE-79), specifically in the rendering of page breadcrumbs in the CMS page list view. Page titles are inserted into the breadcrumb trail without escaping, allowing an attacker to inject malicious scripts. This vulnerability has a CVSS 3.1 base score of 5.4, indicating medium severity. The vulnerability is resolved in Silverstripe CMS version 6.2.1.
Potential Impact
An attacker can exploit this vulnerability to perform reflected cross-site scripting attacks by injecting malicious scripts into page titles that appear in the breadcrumb trail. This can lead to limited confidentiality and integrity impacts, such as executing scripts in the context of the CMS user’s browser session. There is no indication of availability impact or known active exploitation in the wild.
Mitigation Recommendations
Upgrade Silverstripe CMS to version 6.2.1 or later, where the vulnerability is fixed by properly escaping page titles in the breadcrumb trail. No other mitigation or temporary workaround is indicated.
CVE-2026-54717: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in silverstripe silverstripe-cms
Description
Silverstripe CMS versions prior to 6.2.1 have a cross-site scripting (XSS) vulnerability in the page breadcrumbs feature within the CMS page list view. This occurs because page titles are rendered into the breadcrumb trail without proper escaping. The vulnerability is fixed in version 6.2.1.
CVSS v3.1
Score 5.4medium
Affected software
silverstripe
silverstripe-cms
pkg:github/silverstripe/silverstripe-cmsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-54717 is a cross-site scripting vulnerability in Silverstripe CMS affecting versions before 6.2.1. The issue arises from improper neutralization of input during web page generation (CWE-79), specifically in the rendering of page breadcrumbs in the CMS page list view. Page titles are inserted into the breadcrumb trail without escaping, allowing an attacker to inject malicious scripts. This vulnerability has a CVSS 3.1 base score of 5.4, indicating medium severity. The vulnerability is resolved in Silverstripe CMS version 6.2.1.
Potential Impact
An attacker can exploit this vulnerability to perform reflected cross-site scripting attacks by injecting malicious scripts into page titles that appear in the breadcrumb trail. This can lead to limited confidentiality and integrity impacts, such as executing scripts in the context of the CMS user’s browser session. There is no indication of availability impact or known active exploitation in the wild.
Mitigation Recommendations
Upgrade Silverstripe CMS to version 6.2.1 or later, where the vulnerability is fixed by properly escaping page titles in the breadcrumb trail. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-15T23:07:33.231Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a750706bf8831d5395f5aa8
Added to database: 08/06/2026, 22:13:26 UTC
Last enriched: 08/14/2026, 16:18:53 UTC
Last updated: 09/21/2026, 22:01:35 UTC
Views: 22
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.