CVE-2021-43849

App denial of service via malformed activity intents

Published Dec 23, 2021 · Updated Aug 4, 2024

Denial of service in cordova-plugin-fingerprint-aio before 5.0.1 allows local users to crash Android apps via crafted intents. The exported de.niklasmerz.cordova.biometric.BiometricActivity processes invalid or empty intent extras without handling them, triggering a crash. A malicious app installed on the same Android device needs no permission and can repeat the request to keep the target app unusable.

CVSS severity7.2
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in cordova-plugin-fingerprint-aio before 5.0.1 allows local users to crash Android apps via crafted intents. The exported de.niklasmerz.cordova.biometric.BiometricActivity processes invalid or empty intent extras without handling them, triggering a crash. A malicious app installed on the same Android device needs no permission and can repeat the request to keep the target app unusable.

The record

CVE
CVE-2021-43849
Published
Dec 23, 2021
Updated
Aug 4, 2024
Vendor
Niklas Merz
Product
cordova-plugin-fingerprint-aio
Classifications
CWE-284, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Niklas Merz · cordova-plugin-fingerprint-aioversion=< 5.0.1

Published CVSS scores

7.2GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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