Resource exhaustion in Oracle Hospitality Opera 5
CVE-2025-21547
Vulnerability in the Oracle Hospitality OPERA 5 product of Oracle Hospitality Applications (component: Opera Servlet). Supported versions that are affected are 5.6.19.20, 5.6.25.8, 5.6.26.6 and 5.6.27.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hospitality OPERA 5. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Hospitality OPERA 5 accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Hospitality OPERA 5. CVSS 3.1 Base Score 9.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).
Vulnerability class: DoS (Denial of Service)
EPSS: 0.006 (46.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Oracle Hospitality_opera_5 — versions 5.6.19.20, 5.6.25.8, 5.6.26.6
- Oracle Corporation Hospitality Opera 5 — versions 5.6.19.20, 5.6.25.8, 5.6.26.6
Weakness classification (CWE)
References
- secalert_us@oracle.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-21547?
- CVE-2025-21547 is a critical-severity vulnerability in Oracle Hospitality Opera 5, classified under Uncontrolled Resource Consumption. CVSS score: 9.1/10. Published 2025-01-21.
- How severe is CVE-2025-21547?
- Critical severity. CVSS v3 base score is 9.1 out of 10.