Listen to this Post
How the CVE Works
CVE-2025-21547 is an unauthenticated remote code execution vulnerability in Oracle Hospitality OPERA 5’s Opera Servlet component. Attackers exploit it by sending a crafted HTTP request to the vulnerable endpoint, bypassing authentication checks. Due to improper input validation, malicious payloads can trigger arbitrary code execution or a denial-of-service (DoS) condition. The flaw stems from deserialization of untrusted data, allowing attackers to manipulate server-side processes. Successful exploitation grants full access to sensitive data or crashes the service.
DailyCVE Form
Platform: Oracle Hospitality OPERA 5
Version: 5.6.19.20, 5.6.25.8, 5.6.26.6, 5.6.27.1
Vulnerability: RCE/DoS
Severity: Critical
Date: 06/23/2025
Prediction: Patch by Q3 2025
What Undercode Say
nmap -p 80 --script http-vuln-cve2025-21547 <target> curl -X POST -d "malicious_payload" http://<target>/opera_servlet
How Exploit
Craft HTTP request with serialized payload targeting Opera Servlet.
Protection from this CVE
Apply Oracle patches.
Disable exposed endpoints.
Use WAF rules.
Impact
Data theft, system crash.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
