CVE-2025-21547Network attack vector

Unauthenticated data access and denial of service

Published Jan 21, 2025 · Updated Mar 18, 2025

Information disclosure and denial of service in Oracle Hospitality OPERA 5 allows remote attackers to read data or crash the service via HTTP. Oracle has not disclosed the wrong operation performed by Opera Servlet or the HTTP request fields that reach it. Affected builds are 5.6.19.20, 5.6.25.8, 5.6.26.6, and 5.6.27.1; unauthenticated network access is sufficient, and no data modification is reported.

CVSS severity9.1
Critical
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure and denial of service in Oracle Hospitality OPERA 5 allows remote attackers to read data or crash the service via HTTP. Oracle has not disclosed the wrong operation performed by Opera Servlet or the HTTP request fields that reach it. Affected builds are 5.6.19.20, 5.6.25.8, 5.6.26.6, and 5.6.27.1; unauthenticated network access is sufficient, and no data modification is reported.

The record

CVE
CVE-2025-21547
Published
Jan 21, 2025
Updated
Mar 18, 2025
Vendor
Oracle
Product
Oracle Hospitality OPERA 5 Property Services
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.6.19.20
  2. Affected versionversion=5.6.25.8
  3. Affected versionversion=5.6.26.6
  4. Affected versionversion=5.6.27.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle · Oracle Hospitality OPERA 5 Property Servicesversion=5.6.19.20; version=5.6.25.8; version=5.6.26.6; version=5.6.27.1

Published CVSS scores

9.1OracleCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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