CVE-2025-25197
📋 TL;DR
This Cross-Site Scripting (XSS) vulnerability in Silverstripe Elemental allows attackers to inject malicious scripts into the 'Content blocks in use' report. When administrators view this report, the scripts execute in their browser context, potentially compromising their session or performing unauthorized actions. Only Silverstripe installations using the Elemental module with vulnerable versions are affected.
💻 Affected Systems
- Silverstripe Elemental
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Administrator account takeover leading to complete site compromise, data theft, or further server-side attacks if combined with other vulnerabilities.
Likely Case
Session hijacking of administrators, defacement of admin interface, or theft of admin credentials/cookies.
If Mitigated
Limited to admin interface disruption with no data loss if proper access controls and CSP are implemented.
🎯 Exploit Status
Exploitation requires admin-level access to create/modify elemental blocks and another admin to view the vulnerable report.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.3.12
Vendor Advisory: https://www.silverstripe.org/download/security-releases/CVE-2025-25197
Restart Required: No
Instructions:
1. Update Silverstripe Elemental to version 5.3.12 via Composer: composer require silverstripe/elemental:5.3.12
2. Clear Silverstripe cache: vendor/bin/sake dev/build flush=all
3. Verify the update completed successfully.
🔧 Temporary Workarounds
Disable Content Blocks Report
allRemove or restrict access to the vulnerable 'Content blocks in use' report in the admin interface.
Modify CMS configuration to disable or limit the report functionality
Implement Content Security Policy
allAdd CSP headers to prevent script execution from untrusted sources.
Add CSP headers via web server configuration or Silverstripe middleware
🧯 If You Can't Patch
- Restrict admin access to trusted IP addresses only
- Implement strict input validation and output encoding for all user-controlled content in elemental blocks
🔍 How to Verify
Check if Vulnerable:
Check if Silverstripe Elemental version is below 5.3.12 via Composer: composer show silverstripe/elementalCheck Version:
composer show silverstripe/elemental | grep versionsVerify Fix Applied:
Confirm version is 5.3.12 or higher: composer show silverstripe/elemental | grep versions📡 Detection & Monitoring
Log Indicators:
- Unusual admin activity patterns
- Multiple failed login attempts to admin interface
- Unexpected content modifications in elemental blocks
Network Indicators:
- Suspicious requests to admin endpoints with script tags or encoded payloads
SIEM Query:
source="web_logs" AND (uri_path="/admin/*" AND (user_agent CONTAINS "<script>" OR referrer CONTAINS "javascript:"))