CVE-2025-53693 in Experience Manager
Summary
by MITRE • 09/03/2025
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Sitecore Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Cache Poisoning.This issue affects Sitecore Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 through 9.3, from 10.0 through 10.4.
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Analysis
by VulDB Data Team • 09/03/2025
The CVE-2025-53693 vulnerability represents a critical unsafe reflection flaw in Sitecore's Experience Manager and Experience Platform products that enables attackers to manipulate class loading mechanisms through externally controlled inputs. This vulnerability specifically targets the reflection APIs within Sitecore's architecture, allowing malicious actors to influence which classes or code segments are loaded during runtime operations. The issue stems from insufficient validation of input parameters that are used to dynamically select classes or code paths, creating an attack surface where external inputs can directly control the execution flow of the application. The vulnerability affects multiple versions of Sitecore XM and XP, spanning from version 9.0 through 9.3 and 10.0 through 10.4, indicating a widespread impact across the product lineage. This type of vulnerability is categorized under CWE-470 as "Use of Externally-Controlled Input to Select Classes or Code" and aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: Python" and T1059.006 for "Command and Scripting Interpreter: PowerShell" when attackers leverage such reflection mechanisms for code execution.
The operational impact of this vulnerability extends beyond simple cache poisoning to potentially enable full remote code execution within the Sitecore environment. Attackers can exploit this weakness to manipulate the application's behavior by injecting malicious class names or code references through various input vectors including API endpoints, configuration parameters, or user-supplied data that gets processed through reflection mechanisms. The cache poisoning aspect particularly affects Sitecore's performance optimization strategies, where attackers can inject malicious content into cached responses, potentially affecting multiple users or sessions. This vulnerability poses significant risks to content management systems that rely on dynamic class loading for features such as custom components, modules, or extension points. The exploitation could result in unauthorized access to sensitive data, privilege escalation, or complete system compromise depending on the permissions granted to the Sitecore application.
Organizations utilizing affected Sitecore versions should prioritize immediate remediation through official patches provided by Sitecore, as this vulnerability represents a high-severity risk that could be exploited in the wild. The mitigation strategy should include comprehensive input validation and sanitization of all parameters that feed into reflection APIs, implementing strict whitelisting mechanisms for class names and code references, and enforcing proper access controls around configuration and content management interfaces. Security teams should also consider deploying web application firewalls to monitor and block suspicious reflection-based requests, while implementing runtime monitoring to detect anomalous class loading patterns. Additionally, organizations should conduct thorough code reviews focusing on reflection usage patterns and ensure that all external inputs are properly validated before being used in dynamic class loading operations. The vulnerability's impact on cache poisoning also necessitates enhanced monitoring of cache behavior and implementation of secure cache invalidation mechanisms to prevent persistent malicious cache entries from affecting system availability or integrity.