CVE-2020-3282: Cisco Unified Communications Products Cross-Site Scripting Vulnerability

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% 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

A vulnerability in the web-based management interface of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition, Cisco Unified Communications Manager IM & Presence Service, and Cisco Unity Connection could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected software. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted 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.

Affected products

Cisco Unified Communications Manager: from 10.5\(2\) before 10.5\(2\)su10; from 11.5\(1\) before 11.5\(1\)su8; 12.0(1), 12.5(1) — fixed in 10.5\(2\)su10, 11.5\(1\)su8
Cisco Unified Communications Manager IM and Presence Service: from 10.5\(2\) before 10.5\(2\)su10; from 11.5\(1\) before 11.5\(1\)su8; 12.0(1), 12.5(1) — fixed in 10.5\(2\)su10, 11.5\(1\)su8
Cisco Unity Connection: from 10.5\(2\) before 10.5\(2\)su10; from 11.5\(1\) before 11.5\(1\)su8; 12.0(1), 12.5(1) — fixed in 10.5\(2\)su10, 11.5\(1\)su8

How to fix

Upgrade to a fixed version: Cisco Unified Communications Manager 10.5\(2\)su10, 11.5\(1\)su8; Cisco Unified Communications Manager IM and Presence Service 10.5\(2\)su10, 11.5\(1\)su8; Cisco Unity Connection 10.5\(2\)su10, 11.5\(1\)su8. Check the vendor advisory for mitigations.

References

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