CVE-2021-1254: Cisco Finesse Cross-Site Scripting Vulnerabilities

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-05-22 · updated 2026-06-17
Weakness: CWE-79

Description

Multiple vulnerabilities in the web-based management interface of Cisco Finesse could allow an authenticated, remote attacker 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 by the web-based management interface of the affected software. An attacker could exploit these vulnerabilities by injecting malicious code into the web-based management interface and persuading a user to click a malicious link. 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. An attacker needs valid administrator credentials to inject the malicious script code.

Affected products

Cisco Finesse: before 12.6\(1\) — fixed in 12.6\(1\)

How to fix

Upgrade to a fixed version: Cisco Finesse 12.6\(1\). Check the vendor advisory for mitigations.

References

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