CVE-2026-91393

Analyzed Analyzed - Analysis Complete

Cross-Site Scripting in Siebel CRM End User

Publication date: 2026-10-20

Last updated on: 2026-11-04

Assigner: Oracle

Description

Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM End User. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Siebel CRM End User accessible data. CVSS 3.1 Base Score 3.1 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N).

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-20

Last Modified

2026-11-04

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91393

EUVD

EUVD-2026-106647

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	siebel_crm	From 17.0 (inc) to 26.9 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-352	The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Siebel CRM End User (component: Open UI) affecting versions 17.0-26.9. It allows an unauthenticated attacker to potentially modify data in the system through network access via HTTP. The attack requires user interaction and has a low impact on integrity according to CVSS scoring.

Detection Guidance

This vulnerability is specific to Oracle Siebel CRM End User and requires network access via HTTP. Detection may involve checking for unusual HTTP traffic patterns or unauthorized data modifications in the Siebel CRM application. No specific commands are provided in the available context.

Impact Analysis

An attacker could exploit this to make unauthorized changes to data accessible through Siebel CRM End User. This could lead to data corruption or incorrect information being displayed or processed in the system.

Compliance Impact

This vulnerability allows unauthorized modification of data, which could impact integrity. For GDPR, this may affect data accuracy and security obligations. For HIPAA, it could compromise protected health information integrity. However, the limited scope (unauthenticated access required, human interaction needed) reduces but does not eliminate compliance risks.

Mitigation Strategies

Apply the latest Oracle Siebel CRM patches or updates for versions 17.0-26.9 to address the vulnerability in the Open UI component.

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EPSS Chart

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