CVE-2019-5451

Name: CVE-2019-5451
Creator: NVD / NIST
Published: 2019-07-30T21:15:11.71+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.6/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2019-5451 is a medium-severity vulnerability rated 4.6/10 on the CVSS scale. Bypass lock protection in the Nextcloud Android app prior to version 3.6.1 allows accessing the files when repeatedly opening and closing the app in a very short time.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

Bypass lock protection in the Nextcloud Android app prior to version 3.6.1 allows accessing the files when repeatedly opening and closing the app in a very short time.

Metrics

CVSS 3.1

4.6/10

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

EPSS Probability

0.39%

30.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 3.6.1

References

https://hackerone.com/reports/507172Third Party Advisory
https://hackerone.com/reports/507172Third Party Advisory

Timeline

Published: Jul 30, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-5451?

Bypass lock protection in the Nextcloud Android app prior to version 3.6.1 allows accessing the files when repeatedly opening and closing the app in a very short time.

How severe is CVE-2019-5451?

CVE-2019-5451 has a CVSS score of 4.6/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2019-5451?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-5451?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST