dbcve.org
Unified Contact Center ExpressApplication · Cisco

CVE-2025-20358

CRITICAL · 9.8 CVSS v3.1 Published 2025-11-05
Fix available
A fix is available. Upgrade to 12.5 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The vulnerability exists in Cisco Unified CCX's CCX Editor application, which uses improper authentication mechanisms when communicating with the Unified CCX server. An attacker can exploit this by redirecting the authentication flow to a malicious server, tricking the CCX Editor into believing authentication succeeded. This allows the attacker to create and execute arbitrary scripts on the underlying operating system as an internal non-root user account.

MitigationApply the vendor patch for CVE-2025-20358 when available; in the interim, restrict network access to CCX Editor-to-server communication channels and monitor for suspicious authentication redirect patterns.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Unified Contact Center ExpressApplication
Affected:< 12.5\(1\)_su03_es07= 15.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Cisco Unified CCX installation
    Locate the Unified CCX server in your environment and confirm it is running. Check the system inventory or deployed virtual machines for Cisco Unified Contact Center Express components.
    Affected if Cisco Unified CCX is present in the environment and the version falls within the affected ranges
  2. Determine the installed CCX version
    Access the CCX server via admin CLI or web interface and retrieve the exact version number. On the CLI, this is typically shown in the system status or about page. Compare this version against the affected ranges: versions less than 12.5(1)_su03_es07, or exactly version 15.0.
    Affected if The installed version is less than 12.5(1)_su03_es07 OR equals exactly 15.0
  3. Confirm CCX Editor is deployed
    Check if the CCX Editor application is installed or accessible in the environment. CCX Editor is a separate client application used for script editing. Determine if it is present on any workstation or server that connects to the CCX server.
    Affected if CCX Editor is installed and configured to connect to the affected CCX server
  4. Inspect authentication communication channels
    Review network configuration and communication paths between CCX Editor clients and the CCX server. Look for configuration files or registry entries that define the server endpoint the editor connects to for authentication.
    Affected if CCX Editor communicates over configurable network paths to the CCX server (vulnerability requires this communication channel to exist)
  5. Review server authentication configuration
    Examine the CCX server configuration for authentication settings. Check whether the server allows or enforces specific authentication endpoints for the CCX Editor connection.
    Affected if The server configuration permits redirect of authentication flows (vulnerability allows attacker to intercept and redirect this flow)

You are affected if Cisco Unified CCX is installed with a version less than 12.5(1)_su03_es07 or exactly version 15.0, and CCX Editor is actively used to connect to that server.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 12.5 or later
Fixed in 12.5
Interim mitigation

Apply the vendor patch for CVE-2025-20358 when available; in the interim, restrict network access to CCX Editor-to-server communication channels and monitor for suspicious authentication redirect patterns.

Recommended fix Moderate confidence

Unified CCX 12.5(1) su03 es07 or later; Unified CCX 15.0 with corresponding security patch (contact Cisco for specific patch number)

  1. Identify the current version of Cisco Unified Contact Center Express (CCX) by checking the system information in the CCX Administration interface
  2. For systems running version 12.5(1), upgrade to version 12.5(1) su03 es07 or later
  3. For systems running version 15.0, upgrade to the version that includes the security fix for CVE-2025-20358 (contact Cisco for the specific 15.0 patch)
  4. After upgrading, verify the CCX Editor authentication works correctly with the patched server
  5. Ensure the CCX Editor is also updated to a compatible version that works with the patched server
  6. Review CCX system logs for any indicators of exploitation attempts
  7. Restrict network access to the CCX Editor management interface to trusted administrative IPs only as an additional mitigation
Caveat Ensure compatibility between CCX server and CCX Editor versions before upgrading; schedule maintenance window as upgrade may require brief system unavailability

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Unified Contact Center Express Scoped from the published advisory
  • Consultation8.0 h
  • Implementation12.0 h
  • Testing10.0 h
  • Review / QA6.0 h
36.0 hours of engineering $6,340
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-20358 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data