Auth bypass in Cisco Unified Contact Center Express
CVE-2025-20358
A vulnerability in the Contact Center Express (CCX) Editor application of Cisco Unified CCX could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative permissions pertaining to script creation and execution. This vulnerability is due to improper authentication mechanisms in the communication between the CCX Editor and an affected Unified CCX server. An attacker could exploit this vulnerability by redirecting the authentication flow to a malicious server and tricking the CCX Editor into believing the authentication was successful. A successful exploit could allow the attacker to create and execute arbitrary scripts on the underlying operating system of an affected Unified CCX server, as an internal non-root user account.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.009 (59.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000
Affected products
- Cisco Unified Contact Center Express — versions 10.5(1)SU1, 10.6(1), 11.6(1)
- Cisco Unified Contact Center Express — versions 15.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-20358?
- CVE-2025-20358 is a critical-severity vulnerability in Cisco Unified Contact Center Express, classified under Missing Authentication for Critical Function. CVSS score: 9.4/10. Published 2025-11-05.
- How severe is CVE-2025-20358?
- Critical severity. CVSS v3 base score is 9.4 out of 10.