CVE-2021-1380: Cisco Unified Communications Products Cross-Site Scripting Vulnerabilities

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: 2021-04-08 · updated 2026-06-17
Weakness: CWE-89

Description

Multiple vulnerabilities in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against an interface user. These vulnerabilities exist because the web-based management interface does not properly validate user-supplied input. An attacker could exploit these vulnerabilities by persuading an interface user 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: before 14 — fixed in 14
Cisco Unified Communications Manager Im & Presence Service: before 14 — fixed in 14
Cisco Unity Connection: before 14.0 — fixed in 14.0

How to fix

Upgrade to a fixed version: Cisco Unified Communications Manager 14; Cisco Unified Communications Manager Im & Presence Service 14; Cisco Unity Connection 14.0. Check the vendor advisory for mitigations.

References

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