Bypass lock protection in the Nextcloud Android app prior to version 3.6.1 allows accessing the files when repeatedly opening and closing t…

published 2019-07-30 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-15035

cvss: 4.6; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

nextcloud nextcloud_server 3.6.1

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.6	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

n/a com.nextcloud.client

Classification

Weakness

CWE-288 Authentication Bypass Using an Alternate Path or Channel
CWE-306 Missing Authentication for Critical Functionality

References

hackerone.com /reports/507172
third-party-advisory

Sources

CVE List CVE-2019-5451
NVD CVE-2019-5451

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary