CVE-2019-13143

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An HTTP parameter pollution issue was discovered on Shenzhen Dragon Brothers Fingerprint Bluetooth Round Padlock FB50 2.3. With the user ID, user name, and the lock's MAC address, anyone can unbind the existing owner of the lock, and bind themselves instead. This leads to complete takeover of the lock. The user ID, name, and MAC address are trivially obtained from APIs found within the Android or iOS application. With only the MAC address of the lock, any attacker can transfer ownership of the lock from the current user, over to the attacker's account. Thus rendering the lock completely inaccessible to the current user.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
3%
EPSS %ILE
87%
KEV
Not listed

Published

August 6, 2019

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Aug 16, 2026
No patch confirmed yet.
generic

FB50 Smart Lock Vulnerability Disclosure (CVE-2019-13143) - SecureLayer7 - Offensive Security, API Scanner & Attack Surface Management

http://blog.securelayer7.net/fb50-smart-lock-vulnerability-disclosure/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 29× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-18 13:44 UTCEPSS rescore
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  11. 2026-08-08 16:33 UTCEPSS rescore
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  1. 2026-07-24 14:14 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:39 UTCEG score recompute
  4. 2026-07-22 22:19 UTCEG score recompute
  5. 2026-07-22 14:05 UTCEPSS rescore
  6. 2026-07-21 15:22 UTCEPSS rescore
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  8. 2026-07-20 17:04 UTCEPSS rescore
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  18. 2026-07-12 05:43 UTCEPSS rescore
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  20. 2026-07-09 19:06 UTCEPSS rescore
  21. 2026-07-08 15:11 UTCEPSS rescore
  22. 2026-07-07 13:42 UTCEPSS rescore
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  28. 2026-07-02 16:56 UTCEPSS rescore
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  31. 2026-06-30 23:20 UTCEPSS rescore
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  40. 2026-06-24 14:03 UTCEPSS rescore
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  42. 2026-06-22 14:23 UTCEPSS rescore
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  44. 2026-06-21 14:54 UTCEPSS rescore
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  46. 2026-06-21 01:57 UTCEPSS rescore
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  48. 2026-06-19 19:23 UTCEPSS rescore
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  50. 2026-06-18 17:50 UTCEPSS rescore
  51. 2026-06-17 17:50 UTCEPSS rescore
  52. 2026-06-16 17:50 UTCEPSS rescore
  53. 2026-06-15 17:45 UTCEPSS rescore
  54. 2026-06-14 23:15 UTCEPSS rescore
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  56. 2026-06-13 22:58 UTCEPSS rescore
  57. 2026-06-12 23:09 UTCEPSS rescore
  58. 2026-06-11 13:58 UTCEPSS rescore
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  60. 2026-06-10 22:16 UTCEPSS rescore
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  62. 2026-06-07 15:23 UTCEPSS rescore
  63. 2026-06-07 15:22 UTCEPSS rescore
  64. 2026-06-05 22:45 UTCEPSS rescore
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  66. 2026-06-05 06:08 UTCEPSS rescore
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  68. 2026-06-04 13:10 UTCEPSS rescore
  69. 2026-06-04 13:10 UTCEPSS rescore
  70. 2026-06-02 20:11 UTCEPSS rescore
  71. 2026-06-01 13:50 UTCEPSS rescore
  72. 2026-06-01 13:50 UTCEPSS rescore
  73. 2026-05-31 22:29 UTCEPSS rescore
  74. 2026-05-31 22:29 UTCEPSS rescore
  75. 2026-05-31 00:14 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCsecurelayer7/pwnfb50
    First seen Aug 5, 2019

    :unlock: transfer ownership of any FB50 smart lock to yourself (CVE-2019-13143)

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2019-13143?
CVE-2019-13143 is a critical vulnerability published on August 6, 2019. An HTTP parameter pollution issue was discovered on Shenzhen Dragon Brothers Fingerprint Bluetooth Round Padlock FB50 2.3. With the user ID, user name, and the lock's MAC address, anyone can unbind the existing owner of the lock, and bind themselves instead. This leads to complete takeover of the…
When was CVE-2019-13143 disclosed?
CVE-2019-13143 was first published in the National Vulnerability Database on August 6, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-13143 actively exploited?
CVE-2019-13143 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 13.4% of all scored CVEs.
What is the CVSS score of CVE-2019-13143?
CVE-2019-13143 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-13143?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-13143, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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