Security Advisory Desk
mediumQCS priority 82/100Cisco

Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerabilities

Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine (ISE) guest portals could allow an authenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the interface.  These vulnerabilities are due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit these vulnerabilities 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 these vulnerabilities, the attacker must have valid administrative credentials. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xss-42tgsdMG Security Impact Rating: Medium CVE: CVE-2025-20204,CVE-2025-20205

Published 20/7/2026, 10:17:15 amVerified 20/7/2026, 8:37:51 pmRevision 1

Immediate action

Review the official vendor advisory, identify affected deployed versions, and apply the vendor-fixed release or documented mitigation through change control.

Affected and fixed releases

Affected versionsConfirm in the official vendor advisory
Fixed versionsConfirm in the official vendor advisory

Temporary risk reduction

Use only the workaround documented in the linked vendor advisory when immediate patching is not possible.

Operational validation checklist

  • Confirm the deployed product, release, exposure path, and accountable owner.
  • Read the complete vendor advisory and verify every affected-version condition.
  • Back up configuration and define rollback criteria before remediation.
  • Apply the fixed release or documented mitigation through controlled change.
  • Retest exposure, service health, logs, and evidence after the change.

Authoritative reference

Cisco PSIRT Advisories

QCS detected and normalized this record from the official source. Vendor guidance remains authoritative.

Open source