CVE-2019-14711
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 · uneditedVerifone MX900 series Pinpad Payment Terminals with OS 30251000 have a race condition for RBAC bypass.
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 confidenceA race condition vulnerability in Verifone MX900 series Pinpad Payment Terminals running OS 30251000 allows attackers to bypass Role-Based Access Control (RBAC) mechanisms. The race condition likely occurs during the authentication or authorization check process, where an attacker can manipulate timing to bypass privilege boundaries and gain unauthorized access to administrative or elevated functions.
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= 30251000CVSS 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
- Local
- Complexity
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/PR:L/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 checksWork through these to decide whether this CVE applies to you.
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Identify the device modelLocate the physical device or check device inventory for Verifone MX900 series Pinpad Payment TerminalsAffected if Device is a Verifone MX900 series terminal
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Check the firmware versionAccess the terminal's system information or diagnostic menu to retrieve the OS firmware version numberAffected if Firmware version is exactly 30251000
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Confirm RBAC is enabledCheck the terminal security configuration to verify Role-Based Access Control is currently configured and activeAffected if RBAC is enabled and the firmware is version 30251000
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Assess network exposureReview network configuration to determine if the terminal is accessible from untrusted or segmented networksAffected if Terminal is reachable from untrusted network segments without proper isolation
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Review access logs for timing anomaliesExamine authentication and authorization logs for rapid sequential requests or unusual access patterns that may indicate exploitation attemptsAffected if Logs show anomalous access patterns consistent with race condition exploitation
A user is affected if they have a Verifone MX900 terminal running exactly firmware version 30251000 with RBAC enabled and network accessibility to untrusted segments.
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 vendor-supplied firmware updates from Verifone for the MX900 series. If no patch is available, implement network segmentation to isolate payment terminals from untrusted networks and monitor for unusual access patterns that may indicate exploitation attempts.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-14711 — 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-2019-14711 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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