CVE-2025-20279 | Cisco Unifed Contact Center Express Stored Cross-Site Scripting Vulnerability

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.

Published: 2025-06-04 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2025-20279 is rated Low Risk (23.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.21%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-20279

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.14% 0.21% +0.07%
2 2026-03-31 0.03% 0.14% +0.11%
3 2025-11-21 0.03%

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-20279

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
1.7 2.7 [email protected]

Weakness enumeration for CVE-2025-20279

Affected software / configurations for CVE-2025-20279

Vendor Product Version Raw CPE
cisco unified_contact_center_express 8.5\(1\) cpe:2.3:a:cisco:unified_contact_center_express:8.5\(1\):*:*:*:*:*:*:*
cisco unified_contact_center_express 9.0\(2\)su3es04 cpe:2.3:a:cisco:unified_contact_center_express:9.0\(2\)su3es04:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.0\(1\)su1 cpe:2.3:a:cisco:unified_contact_center_express:10.0\(1\)su1:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.0\(1\)su1es04 cpe:2.3:a:cisco:unified_contact_center_express:10.0\(1\)su1es04:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.5\(1\) cpe:2.3:a:cisco:unified_contact_center_express:10.5\(1\):*:*:*:*:*:*:*
cisco unified_contact_center_express 10.5\(1\)su1 cpe:2.3:a:cisco:unified_contact_center_express:10.5\(1\)su1:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.5\(1\)su1es10 cpe:2.3:a:cisco:unified_contact_center_express:10.5\(1\)su1es10:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.6\(1\) cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\):*:*:*:*:*:*:*
cisco unified_contact_center_express 10.6\(1\)su1 cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\)su1:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.6\(1\)su2 cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\)su2:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.6\(1\)su2es04 cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\)su2es04:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.6\(1\)su3 cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\)su3:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.6\(1\)su3es01 cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\)su3es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.6\(1\)su3es02 cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\)su3es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 10.6\(1\)su3es03 cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\)su3es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.0\(1\)su1 cpe:2.3:a:cisco:unified_contact_center_express:11.0\(1\)su1:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.0\(1\)su1es02 cpe:2.3:a:cisco:unified_contact_center_express:11.0\(1\)su1es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.0\(1\)su1es03 cpe:2.3:a:cisco:unified_contact_center_express:11.0\(1\)su1es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.5\(1\)es01 cpe:2.3:a:cisco:unified_contact_center_express:11.5\(1\)es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.5\(1\)su1 cpe:2.3:a:cisco:unified_contact_center_express:11.5\(1\)su1:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.5\(1\)su1es01 cpe:2.3:a:cisco:unified_contact_center_express:11.5\(1\)su1es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.5\(1\)su1es02 cpe:2.3:a:cisco:unified_contact_center_express:11.5\(1\)su1es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.5\(1\)su1es03 cpe:2.3:a:cisco:unified_contact_center_express:11.5\(1\)su1es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(1\) cpe:2.3:a:cisco:unified_contact_center_express:11.6\(1\):*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(1\)es01 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(1\)es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(1\)es02 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(1\)es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\) cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\):*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\)es01 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\)es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\)es02 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\)es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\)es03 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\)es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\)es04 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\)es04:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\)es05 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\)es05:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\)es06 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\)es06:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\)es07 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\)es07:*:*:*:*:*:*:*
cisco unified_contact_center_express 11.6\(2\)es08 cpe:2.3:a:cisco:unified_contact_center_express:11.6\(2\)es08:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.0\(1\) cpe:2.3:a:cisco:unified_contact_center_express:12.0\(1\):*:*:*:*:*:*:*
cisco unified_contact_center_express 12.0\(1\)es01 cpe:2.3:a:cisco:unified_contact_center_express:12.0\(1\)es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.0\(1\)es02 cpe:2.3:a:cisco:unified_contact_center_express:12.0\(1\)es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.0\(1\)es03 cpe:2.3:a:cisco:unified_contact_center_express:12.0\(1\)es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.0\(1\)es04 cpe:2.3:a:cisco:unified_contact_center_express:12.0\(1\)es04:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\) cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\):*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su01_es01 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su01_es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su01_es02 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su01_es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su01_es03 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su01_es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su02_es01 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su02_es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su02_es02 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su02_es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su02_es03 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su02_es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su02_es04 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su02_es04:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su03_es01 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su03_es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su03_es02 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su03_es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su03_es03 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su03_es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su03_es04 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su03_es04:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su03_es05 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su03_es05:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)_su03_es06 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)_su03_es06:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)es01 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)es01:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)es02 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)es02:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)es03 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)es03:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)su1 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)su1:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)su2 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)su2:*:*:*:*:*:*:*
cisco unified_contact_center_express 12.5\(1\)su3 cpe:2.3:a:cisco:unified_contact_center_express:12.5\(1\)su3:*:*:*:*:*:*:*

References for CVE-2025-20279

cvelogic Threat Intelligence