Secure Firewall Management CenterApplication · Cisco
CVE-2024-20274
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 Secure Firewall Management Center (FMC) Software, formerly Firepower Management Center Software, could allow an authenticated, remote attacker to inject arbitrary HTML content into a device-generated document. This vulnerability is due to improper validation of user-supplied data. An attacker could exploit this vulnerability by submitting malicious content to an affected device and using the device to generate a document that contains sensitive information. A successful exploit could allow the attacker to alter the standard layout of the device-generated documents, access arbitrary files from the underlying operating system, and conduct server-side request forgery (SSRF) attacks. To successfully exploit this vulnerability, an attacker would need valid credentials for a user account with policy-editing permissions, such as Network Admin, Intrusion Admin, or any custom user role with the same capabilities.
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 · moderate confidenceStored HTML injection vulnerability in Cisco FMC web-based management interface allows authenticated attackers with policy-editing permissions to inject malicious HTML into device-generated documents. This can enable arbitrary file access from the underlying OS and SSRF attacks due to improper validation of user-supplied data.
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
Secure Firewall Management CenterApplication
= 6.2.3= 6.2.3.1= 6.2.3.2= 6.2.3.3= 6.2.3.4= 6.2.3.5= 6.2.3.6= 6.2.3.7= 6.2.3.8= 6.2.3.9= 6.2.3.10= 6.2.3.11CVSS 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
- High
- User interaction
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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 FMC versionAccess the Firepower Management Center web interface and navigate to the System > Licensing page or use the CLI and run 'show version' to display the installed software versionAffected if The displayed version is 6.2.3, 6.2.3.1, 6.2.3.2, 6.2.3.3, 6.2.3.4, 6.2.3.5, 6.2.3.6, 6.2.3.7, 6.2.3.8, 6.2.3.9, 6.2.3.10, or 6.2.3.11
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Verify web-based management interface is enabledConfirm that the FMC web-based management interface is accessible and not disabled through network access restrictions or interface bindingsAffected if The web interface is active and reachable on the network
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Check for policy-editing user accountsReview user accounts in the FMC via the System > Users or User Management section and identify accounts granted policy-editor, admin, or equivalent roles that permit modifying security policiesAffected if There are one or more user accounts with policy-editing or administrative privileges active in the system
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Audit device-generated document exportsExamine any exported reports, PDF documents, or policy exports generated through the FMC for unexpected script tags or HTML content if you suspect prior exploitationAffected if Exported documents contain unauthorized HTML, script tags, or iframe elements not authored by administrators
You are affected if your Cisco Secure Firewall Management Center runs version 6.2.3 through 6.2.3.11, has the web interface enabled, and contains at least one account with policy-editing permissions.
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 · scopedApply Cisco's vendor patches for this vulnerability. Ensure policy-editing accounts follow least-privilege principles and limit exposure of administrative interfaces.
Cisco FMC 6.2.3.4 or later (recommended: latest 6.x or 7.x stable release such as 7.4.x)
- 1. Verify current FMC version by navigating to Help > About in the FMC web interface
- 2. Confirm you have valid credentials for an account with Network Admin, Intrusion Admin, or equivalent policy-editing permissions
- 3. Create a backup of the FMC configuration before performing any upgrade
- 4. Schedule a maintenance window as upgrades require brief downtime
- 5. Download the upgrade package from Cisco Software Central (software.cisco.com) - obtain the latest 6.2.3.x maintenance update or upgrade to 6.4+ / 7.0+ stable release
- 6. Upload the upgrade package via FMC web interface: System > Updates > Product Updates
- 7. Follow the on-screen prompts to install the update
- 8. After upgrade, verify the new version matches the expected fixed release
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Secure Firewall Management Center
Scoped from the published advisory
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-20274 — 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-2024-20274 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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