Cisco Unifed Contact Center Express Stored Cross-Site Scripting Vulnerability

published 2025-06-04 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-16885

cvss: 4.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits: 0; none known

A vulnerability in the web-based management interface of Cisco Unified CCX could allow an authenticated, remote attacker to conduct a stored XSS attack on an affected system. To exploit this vulnerability, the attacker must have valid administrative credentials.

This vulnerability is due to improper sanitization of user input to the web-based management interface. An attacker could exploit this vulnerability by submitting a malicious script through the interface. A successful exploit could allow the attacker to conduct a stored XSS attack on the affected system.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 17 mo ago (2025-06-04)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

Cisco Cisco Unified Contact Center Express

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

sec.cloudapps.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-uccx-multi-UhOTvPGL
vendor-advisory

Sources

CVE List CVE-2025-20279
NVD CVE-2025-20279

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Summary