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
CSIRTS triage
- What
- Multiple vulnerabilities in the web-based management interface could allow an authenticated attacker to conduct cross-site scripting (XSS) attacks.
- Who is affected
- Authenticated users of the Cisco Identity Services Engine web interface.
- Urgency
- Remediation is important due to the potential for sensitive information exposure, although exploitation requires valid credentials.
- Action
- Apply the software updates released by Cisco to address these vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2025-202040.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2025-202050.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-20204 | coverage & exploitation status | NVD · CVE.org |
| CVE-2025-20205 | coverage & exploitation status | NVD · CVE.org |
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