How severe is CVE-2021-43849?

CVE-2021-43849 has a CVSS score of 5.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2021-43849?

CVE-2021-43849 affects the following packages: cordova-plugin-fingerprint-aio (npm). Ecosystems affected: npm.

How do I fix CVE-2021-43849?

Update cordova-plugin-fingerprint-aio to 5.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-43849 is resolved across your whole dependency graph.

How do I detect CVE-2021-43849 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cordova-plugin-fingerprint-aio, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-43849 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2021-43849 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-43849 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-43849?

CVE-2021-43849 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 28th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-43849?

CVE-2021-43849 is classified as Reachable Assertion (CWE-617). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2021-43849 published, and has it been updated?

CVE-2021-43849 was published on December 23, 2021 and was last updated on October 20, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦

📦 npm

Not in CISA KEV

MEDIUM severity

CVE-2021-43849 — cordova-plugin-fingerprin…

MEDIUMFix: NiklasMerz/cordova-plugin-fingerprint-aio@27434a2

CVE-2021-43849 is a medium-severity (CVSS 5.5) Reachable Assertion vulnerability in cordova-plugin-fingerprint-aio. A fix is available for cordova-plugin-fingerprint-aio — see the affected versions and patch details below.

cordova-plugin-fingerprint-aio DoS vulnerability

Also known asGHSA-7vfx-hfvm-rhr8

Published

Dec 23, 2021

Updated

Oct 20, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs28th percentile — riskier than 28% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

5other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

cordova-plugin-fingerprint-aionpm

11Kdownloads / week

Description

Summary:

Sending a specially crafted intent with an invalid/empty extras de.niklasmerz.cordova.biometric.BiometricActivity can cause the app to crash. sending the intent repeatedly can prevent the app using this plugin from working, resulting in a denial of service (DoS) condition.

Impact

A 3rd party app/remote attacker can exploit this vulnerability by sending a malicious intent to the target device, causing the app using this plugin from working to crash or become unresponsive, resulting in a denial of service (DoS) condition.

Mitigation

Version 5.0.1 of the cordova-plugin-fingerprint-aio doesn't export the activity anymore and is no longer vulnerable.

If you want to fix older versions change the attribute android:exported of this code snippet in plugin.xml to false:

<config-file target="AndroidManifest.xml" parent="application">
      <activity android:name="de.niklasmerz.cordova.biometric.BiometricActivity" android:theme="@style/TransparentTheme" android:exported="false"/>
</config-file>

Patches

Please upgrade to version 5.0.1 as soon as possible.

Please check out the release on GitHub.

For more information

If you have any questions or comments about this advisory please go to the discussion on GitHub.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`cordova-plugin-fingerprint-aio`	all versions	5.0.1`npm install cordova-plugin-fingerprint-aio@5.0.1`

Affected Products

1 product · 1 configurations

Application

cordova plugin fingerprint all-in-onecordova_plugin_fingerprint_all-in-one_project

< 5.0.1

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cordova-plugin-fingerprint-aio, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update cordova-plugin-fingerprint-aio to 5.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-43849 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

## Summary: Sending a specially crafted intent with an invalid/empty extras `de.niklasmerz.cordova.biometric.BiometricActivity` can cause the app to crash. sending the intent repeatedly can prevent the app using this plugin from working, resulting in a denial of service (DoS) condition. ## Impact A 3rd party app/remote attacker can exploit this vulnerability by sending a malicious intent to the target device, causing the app using this plugin from working to crash or become unresponsive, resulting in a denial of service (DoS) condition. ## Mitigation Version 5.0.1 of the cordova-plugin-fi

O3 Security · Impact-Aware SCA

Is CVE-2021-43849 in your dependencies?

Find it across npm, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5.5/10CVSS v3 base

Vector breakdown

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Raw vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE Classification

CWE-617Reachable Assertion

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Dec 23, 2021

Last updated

Oct 20, 2026

Identifiers

CVE-2021-43849

GHSA-7vfx-hfvm-rhr8

References

Advisorygithub.com · v5.0.1 Advisorygithub.com · GHSA 7vfx hfvm rhr8 Advisorynvd.nist.gov · CVE 2021 43849 Fixgithub.com · 27434a240f97f69fd930088654590c8ba43569df Webgithub.com Packagegithub.com · cordova plugin fingerprint aio

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs with CWE-617 are rated as high or higher (top: high).

CVE-2026-115914CVE-2026-87018CVE-2026-105753CVE-2026-105754CVE-2026-71430CVE-2026-52856CVE-2026-55514CVE-2026-52829Browse all CWE-617

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 20, 2026

CVE-2021-43849 — cordova-plugin-fingerprin…

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Summary:

Impact

Mitigation

Patches

For more information

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2021-43849 in your dependencies?