Oracle Hospitality OPERA 5 5.6.19.20/5.6.25.8/5.6.26.6/5.6.27.1 Opera Servlet improper authentication

Summaryinfo

A vulnerability was found in Oracle Hospitality OPERA 5 5.6.19.20/5.6.25.8/5.6.26.6/5.6.27.1. It has been declared as critical. The impacted element is an unknown function of the component Opera Servlet. Executing a manipulation can lead to improper authentication. This vulnerability is handled as CVE-2025-21547. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical was found in Oracle Hospitality OPERA 5 5.6.19.20/5.6.25.8/5.6.26.6/5.6.27.1. This vulnerability affects some unknown processing of the component Opera Servlet. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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).

The advisory is shared for download at oracle.com. This vulnerability was named CVE-2025-21547 since 12/25/2024. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/18/2025).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Hospitality Software

Vendor

• Oracle

Name

• Hospitality OPERA 5

Version

• 5.6.19.20
• 5.6.25.8
• 5.6.26.6
• 5.6.27.1

License

• commercial

Website

• Vendor: https://www.oracle.com

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