Cisco Identity Services Engine Software up to 3.4.0 cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in Cisco Identity Services Engine Software. This issue affects some unknown processing. Such manipulation leads to cross site scripting. This vulnerability is listed as CVE-2026-20047. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Identity Services Engine Software. It has been rated as problematic. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. Impacted is integrity. CVE summarizes:

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit this vulnerability, the attacker must have valid administrative credentials.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability is handled as CVE-2026-20047 since 10/08/2025. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0128). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Cisco Identity Services Engine (ISE)

Productinfo

Type

• Policy Management Software

Vendor

• Cisco

Name

• Identity Services Engine Software

Version

• 3.1.0
• 3.1.0 p1
• 3.1.0 p2
• 3.1.0 p3
• 3.1.0 p4
• 3.1.0 p5
• 3.1.0 p6
• 3.1.0 p7
• 3.1.0 p8
• 3.1.0 p9
• 3.1.0 p10
• 3.2.0
• 3.2.0 p1
• 3.2.0 p2
• 3.2.0 p3
• 3.2.0 p4
• 3.2.0 p5
• 3.2.0 p6
• 3.2.0 p7
• 3.3.0
• 3.4.0

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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