Content Security Management ApplianceApplication · Cisco
CVE-2018-15393
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 Content Security Management Appliance (SMA) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected device. An attacker could exploit this vulnerability by persuading a user of the interface to click a maliciously crafted link. 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.
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 confidenceThis is a reflected XSS vulnerability in Cisco Content Security Management Appliance web-based management interface. The interface fails to properly validate user-supplied input, allowing an attacker to inject malicious script code via a crafted URL. Successful exploitation enables arbitrary JavaScript execution in the user's browser context or exfiltration of session-sensitive information.
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
Content Security Management ApplianceApplication
all versionsCVSS 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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/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 the Cisco SMA applianceLog into the appliance or check network inventory to confirm the device model is Cisco Content Security Management Appliance (SMA). Look at the web interface login page or CLI output for product identification.Affected if The device is a Cisco Content Security Management Appliance running any software version.
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Confirm the web management interface is enabledCheck if the web-based management interface (HTTPS/HTTP) is accessible by attempting to reach the SMA login page via browser or curl command (e.g., curl -k https://<sma-ip>/). Verify the service is listening on ports 443 or 80.Affected if The web management interface is exposed and accessible on the network.
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Test for reflected XSS in URL parametersAccess the SMA login page and modify URL parameters to include a test payload such as <script>alert('XSS')</script> or a benign probe like ?test=<script>alert(1)</script>. Observe if the payload is reflected back in the page response without sanitization or encoding.Affected if User-supplied input in the URL is reflected unescaped in the page HTML, indicating the XSS vulnerability is present.
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Review web server response headersCapture HTTP responses from the SMA web interface using browser developer tools or curl -I. Check if Content-Security-Policy headers are present and whether they restrict inline script execution.Affected if CSP headers are missing or overly permissive, reducing defense-in-depth against reflected XSS.
If the device is a Cisco Content Security Management Appliance with its web management interface accessible, it is affected by this vulnerability since all versions are impacted.
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.
From vendor dataApply Cisco-provided security updates for the SMA software. Until patches are available, users should avoid clicking untrusted links to the management interface. Implementing Content Security Policy (CSP) headers can provide defense-in-depth against XSS attacks.
Fix this in Content Security Management Appliance
Scoped from the published advisory
- Consultation3.0 h
- Implementation8.0 h
- Testing4.0 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 $5,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-15393 — 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-2018-15393 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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- Version or environment caveats, and links to real fixes
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