Sitecore Exploit Chain: Cache Poisoning & Remote Code Execution
sitecore Vulnerabilities – August 29, 2025 – lisapark
This report details three recently disclosed security vulnerabilities affecting the Sitecore Experience Platform.
Summary: Three vulnerabilities have been identified in Sitecore, potentially leading to details disclosure and remote code execution (RCE). Patches have been released by Sitecore for all three.
Details:
The vulnerabilities, as reported by watchTowr Labs, are:
| CVE ID | Vulnerability | Description | Patch release Date |
|---|---|---|---|
| CVE-2025-53693 | HTML Cache Poisoning | Through unsafe reflections. | June 2025 |
| CVE-2025-53691 | Remote Code Execution (RCE) | Through insecure deserialization. | June 2025 |
| CVE-2025-53694 | Information disclosure | In ItemService API with a restricted anonymous user, exposing cache keys via brute-force. | July 2025 |
Impact: Successful exploitation of these vulnerabilities could result in:
Remote Code Execution
Unauthorized access to information
Mitigation:
Apply the patches released by Sitecore:
articleview&sysparmarticle=KB1003734″ rel=”noopener” target=”blank”>KB1003734 (CVE-2025-53694)
Source:
Metadata:
date: August 29, 2025
Author: Ravie Lakshmanan
* Tags: Vulnerability, Web Security