Unified Contact Center Management PortalApplication · Cisco
CVE-2024-20540
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 · uneditedA vulnerability in the web-based management interface of Cisco Unified Contact Center Management Portal (Unified CCMP) could allow an authenticated, remote attacker with low privileges to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by injecting malicious code into a specific page of the interface. 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. To exploit this vulnerability, the attacker must have at least a Supervisor role on an affected device.
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 confidenceA stored cross-site scripting (XSS) vulnerability exists in Cisco Unified CCMP's web-based management interface due to improper validation of user-supplied input. An authenticated attacker with Supervisor privileges can inject malicious script code into a specific page, which then executes in the context of other users' browsers when they access that page.
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 Management PortalApplication
< 12.6\(1\)_es14CVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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 checksWork through these to decide whether this CVE applies to you.
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Identify Cisco Unified CCMP installationLocate the Cisco Unified Contact Center Management Portal application in your environment - check installed software listings, running services, or documentation for presence of this product.Affected if The product is not installed, the check does not apply.
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Verify installed versionAccess the web-based management interface and navigate to the About or System Information page to find the exact version number, or use the command line interface if documented for version retrieval.Affected if The installed version is below 12.6(1)_es14, meaning any version from initial release up to 12.6(1)es13 is affected.
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Confirm web interface accessibilityAttempt to access the Cisco Unified CCMP web-based management interface URL (typically on port 8443 or 443) from a browser or verify the web service is listening.Affected if The web interface is exposed and reachable, which is required for the XSS to be exploitable.
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Check for Supervisor role accountsReview user accounts and roles configured in the management interface, specifically looking for accounts assigned the Supervisor role.Affected if Supervisor role accounts exist in the system, as this privilege level is required to inject the malicious script.
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Inspect web interface input fields for script tagsReview web application logs, database records for management portal pages, or manually inspect input fields (such as name, description, or comment fields) in the interface for unsanitized HTML/script content.Affected if Suspicious script tags or HTML elements are found stored in the interface, indicating potential exploitation.
Your environment is affected if Cisco Unified CCMP is installed with a version below 12.6(1)_es14, the web management interface is accessible, and Supervisor role accounts exist or have been created.
Generated from the published advisory. Verify against your own configuration.
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 · scoped12.6
Apply the vendor-supplied patch from Cisco. Until then, restrict access to the Supervisor role to trusted users only and monitor for suspicious script injection in web interface fields.
12.6(1)_es14
- Back up the current Unified CCMP configuration and database before initiating the upgrade
- Download Unified CCMP version 12.6(1)_es14 from the Cisco software downloads page (requires Cisco service contract)
- Review Cisco release notes for 12.6(1)_es14 for any specific installation prerequisites
- Follow the Cisco Unified CCMP upgrade procedure documented in the installation and upgrade guide
- After upgrade, verify the 12.6(1)_es14 version is correctly installed via the web-based management interface or CLI
- Log in with a Supervisor account and confirm the XSS fix is applied by testing input validation on the affected page
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Unified Contact Center Management Portal
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-20540 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-20540 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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