CVE-2025-53694

Executive Summary

CVE-2025-53694 is a high-severity information disclosure vulnerability affecting Sitecore Experience Manager (XM) and Experience Platform (XP) versions 9.2 through 10.4. The vulnerability allows an unauthorized actor to access sensitive information, potentially exposing internal configurations, user data, or other confidential data. With a CVSS score of 7.5 and a network-based attack vector requiring no authentication, this flaw poses a significant risk to organizations using these platforms. As of this report, no official patch has been released, and no public proof-of-concept (PoC) or exploit code is available. The EPSS score of 0.0% suggests low exploitation activity in the wild, but the lack of a patch makes proactive detection and mitigation critical.

CVSS Breakdown & Threat Level

• CVSS Score: 7.5 (High)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
• Attack Vector: Network (AV:N) – exploitable remotely.
• Attack Complexity: Low (AC:L) – no special conditions required.
• Privileges Required: None (PR:N) – no authentication needed.
• User Interaction: None (UI:N) – no user action required.
• Scope: Unchanged (S:U) – impact confined to vulnerable component.
• Confidentiality Impact: High (C:H) – significant information exposure.
• Integrity Impact: None (I:N) – no data modification.
• Availability Impact: None (A:N) – no denial of service.

Threat Level: High. The vulnerability is remotely exploitable without authentication, and the lack of a patch increases the risk of data breaches.

Deep Dive & Mechanics

The vulnerability resides in the Sitecore Experience Manager (XM) and Experience Platform (XP) versions 9.2 through 10.4. It is classified as an "Exposure of Sensitive Information to an Unauthorized Actor" (CWE-200). The exact mechanism is not publicly disclosed, but based on the nature of the vulnerability, it likely involves improper access controls or insecure handling of API endpoints, configuration files, or error messages that leak sensitive data.

Sitecore is a widely used enterprise content management system (CMS) and digital experience platform. The affected versions are commonly deployed in large organizations for web content management, marketing automation, and customer experience analytics. An attacker could exploit this vulnerability to extract sensitive information such as database connection strings, encryption keys, user credentials, or internal network details, which could then be used for further attacks.

The vulnerability is network-based and requires no authentication, meaning any unauthenticated user on the network can potentially trigger the information disclosure. The lack of a patch from Sitecore as of this report means that all affected versions are currently vulnerable.

Vulnerable vs. Patched Code

Since no patch is available, a direct code comparison cannot be provided. However, based on the vulnerability type, the following general patterns are expected:

Vulnerable Code (Hypothetical Example):

// Vulnerable: Exposes sensitive data in error response
public IActionResult GetConfig()
{
    try
    {
        var config = LoadConfiguration();
        return Ok(config);
    }
    catch (Exception ex)
    {
        // Leaks stack trace and internal paths
        return StatusCode(500, ex.ToString());
    }
}

Patched Code (Expected Fix):

// Patched: Sanitizes error responses and restricts access
[Authorize(Roles = "Admin")]
public IActionResult GetConfig()
{
    try
    {
        var config = LoadConfiguration();
        return Ok(config);
    }
    catch (Exception ex)
    {
        // Logs full error internally, returns generic message
        _logger.LogError(ex, "Configuration load failed");
        return StatusCode(500, "An error occurred.");
    }
}

The fix would involve implementing proper authentication/authorization checks, sanitizing error messages, and restricting access to sensitive endpoints.

Exploitation & Lab Setup

Red Team (Offensive)

Objective: Exploit the vulnerability to extract sensitive information from a vulnerable Sitecore instance.

Lab Setup:

1. Deploy a vulnerable Sitecore XM/XP instance (version 9.2-10.4) in an isolated environment.
2. Ensure the instance is accessible over the network.

Exploitation Steps:

1. Reconnaissance: Identify the Sitecore version and potential endpoints.

   curl -s http://target/sitecore/shell/ | grep -i "version"
   

2. Endpoint Discovery: Probe for common information disclosure endpoints.

   # Example endpoints to test
   curl -s http://target/sitecore/admin/showconfig.aspx
   curl -s http://target/sitecore/api/ssc/config
   curl -s http://target/-/media/.../web.config
   

3. Exploit: If an endpoint leaks sensitive data, extract it.

   curl -s http://target/sitecore/admin/showconfig.aspx | grep -E "(connectionString|password|key)"
   

4. Data Exfiltration: Save the extracted data for further analysis.

Note: No public PoC exists; this is a hypothetical exploitation path based on the vulnerability type.

Blue Team (Defensive)

Objective: Detect and mitigate exploitation attempts.

Detection:

• Monitor for unusual access to Sitecore admin endpoints (e.g., /sitecore/admin/, /sitecore/api/).
• Alert on error responses containing stack traces or configuration data.
• Use the detection rules provided in the Detection Engineering section.

Mitigation:

• Implement network segmentation to restrict access to Sitecore instances.
• Apply virtual patching via WAF rules to block known malicious patterns.
• Monitor logs for unauthorized access attempts.

Indicators of Compromise (IOCs)

• Network Indicators:
  • HTTP requests to /sitecore/admin/showconfig.aspx
  • HTTP requests to /sitecore/api/ssc/config
  • HTTP requests containing web.config or connectionString in the response
• File Indicators:
  • Unauthorized access to App_Config/ConnectionStrings.config
  • Unauthorized access to App_Config/Security/Global.config
• Behavioral Indicators:
  • Multiple failed authentication attempts followed by successful data extraction
  • Anomalous outbound data transfers from the Sitecore server

Detection Engineering

YARA Rule

rule CVE_2025_53694_Sitecore_InfoDisclosure {
    meta:
        description = "Detects attempts to exploit CVE-2025-53694 in Sitecore"
        author = "Valters IT"
        date = "2025-04-10"
        severity = "high"
    strings:
        $s1 = "/sitecore/admin/showconfig.aspx" ascii wide nocase
        $s2 = "/sitecore/api/ssc/config" ascii wide nocase
        $s3 = "connectionString" ascii wide nocase
        $s4 = "web.config" ascii wide nocase
    condition:
        any of ($s1, $s2) or (any of ($s3, $s4) and filesize < 10MB)
}

Sigma Rule

title: CVE-2025-53694 Sitecore Information Disclosure Attempt
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects HTTP requests targeting sensitive Sitecore endpoints
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: iis
detection:
    selection:
        cs-uri-stem:
            - '/sitecore/admin/showconfig.aspx'
            - '/sitecore/api/ssc/config'
            - '/sitecore/shell/'
    condition: selection
falsepositives:
    - Legitimate administrative access
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-53694 Sitecore Information Disclosure Attempt"; flow:to_server; content:"/sitecore/admin/showconfig.aspx"; http_uri; nocase; sid:1000001; rev:1;)
alert http any any -> any any (msg:"CVE-2025-53694 Sitecore API Config Access"; flow:to_server; content:"/sitecore/api/ssc/config"; http_uri; nocase; sid:1000002; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate Affected Systems: Place vulnerable Sitecore instances behind a firewall or VPN to restrict network access.
2. Apply Virtual Patching: Use WAF rules to block access to sensitive endpoints (e.g., /sitecore/admin/, /sitecore/api/).
3. Monitor Logs: Enable detailed logging and monitor for suspicious access patterns.

Long-Term Fix:

• Await an official patch from Sitecore. Once released, apply it immediately to all affected versions.
• Upgrade to a patched version if available (check Sitecore’s official advisory).
• Conduct a security audit of custom code and configurations to ensure no additional information disclosure vectors exist.

Workarounds:

• Disable or restrict access to administrative endpoints via IIS URL Rewrite rules.
• Implement custom authentication for sensitive API endpoints.
• Review and harden error handling to prevent stack trace leakage.

Valters IT