CVE-2026-101495 in Siebel CRM Development
Summary
by MITRE • 10/21/2026
Vulnerability in the Siebel CRM Development product of Oracle Siebel CRM (component: Siebel Approval Manager). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Development. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Siebel CRM Development. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Siebel Approval Manager component of Oracle Siebel CRM Development, specifically affecting supported versions ranging from 17.0 through 26.9. This security flaw represents a critical risk to organizations relying on this enterprise customer relationship management platform for their business operations and approval workflows. The core technical deficiency allows an unauthenticated attacker with network access via HTTP to compromise the integrity of the Siebel CRM Development environment. Unlike many vulnerabilities that require prior authentication or complex privilege escalation, this issue permits direct exploitation by any remote actor who can reach the affected service over standard web protocols. This significantly lowers the barrier for entry, as no valid user credentials are necessary to initiate an attack sequence against the vulnerable component.
The operational impact of this vulnerability is severe, characterized by a CVSS 3.1 Base Score of 8.8, which indicates a High severity rating based on its potential effects on confidentiality, integrity, and availability. The exploitation vector involves network access with low complexity but requires human interaction from a victim other than the attacker. This social engineering aspect suggests that while the technical exploit may be straightforward to trigger once initiated, it likely relies on tricking an authorized user into performing a specific action or clicking a malicious link within the application interface. Despite this requirement for user interaction, successful exploitation leads directly to full takeover of the Siebel CRM Development instance. Such compromise grants the attacker comprehensive control over the development environment, potentially allowing them to manipulate source code, inject malicious logic, alter configuration settings, and access sensitive data stored or processed by the system.
From a classification perspective, this vulnerability aligns with CWE-79, which covers Cross-Site Scripting (XSS) vulnerabilities where untrusted input is not properly neutralized before being placed in web pages served to other users. It also correlates with ATT&CK technique T1059, Command and Scripting Interpreter, as the takeover implies the ability to execute arbitrary commands or scripts within the context of the application server. The requirement for human interaction places it under ATT&CK tactic TA0001, Initial Access, specifically leveraging user trust through techniques like Spearphishing Attachment or Spearphishing Link if delivered via external channels, though internal exploitation may involve direct manipulation of UI elements to trigger the flaw.
Mitigation strategies must address both immediate remediation and long-term security posture improvements. The primary defense is the application of vendor-supplied patches or updates that resolve the specific code defect in Siebel Approval Manager. Organizations should prioritize updating all instances running versions 17.0 through 26.9 to their latest supported releases as soon as they become available from Oracle. In scenarios where immediate patching is not feasible due to operational constraints, network-level controls such as Web Application Firewalls (WAFs) can be configured to detect and block exploit patterns associated with this vulnerability. Additionally, implementing strict input validation on the client side and ensuring that all user inputs are properly encoded before rendering in the browser can help mitigate similar XSS-based attacks. Security awareness training for users is also critical given the human interaction requirement; employees should be educated to recognize suspicious requests or unusual behavior within the Siebel interface that might indicate an attempted exploitation of this flaw. Regular vulnerability scanning and penetration testing focused on web application components will further aid in identifying any residual risks or misconfigurations that could expose similar attack surfaces.