CVE-2020-3340: Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerabilities

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-02 · updated 2026-06-17
Weakness: CWE-79

Description

Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker with administrative credentials to conduct a cross-site scripting (XSS) attack against a user of the interface. These vulnerabilities are due to insufficient validation of user-supplied input that is processed by the web-based management interface. 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 interface or access sensitive, browser-based information. To exploit these vulnerabilities, an attacker would need valid administrative credentials.

Affected products

Cisco Identity Services Engine: before 2.6.0; 2.6.0, 2.6.0-patch1, 2.6.0-patch2, 2.6.0-patch3, 2.6.0-patch5, 2.6.0-patch6 — fixed in 2.6.0

How to fix

Upgrade to a fixed version: Cisco Identity Services Engine 2.6.0. Check the vendor advisory for mitigations.

References

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