Nextcloud is an open source content collaboration platform. From version 33.0.0 to before version 33.1.0, after unlocking a locked Android phone the back-button could be used to bypass the Nextcloud Files app PIN. This issue has been patched in version 33.1.0.

No CVSS v4.0

Attack Vector Physical

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
nextcloud security-advisories affected
Version Status Constraints
>= 33.0.0, < 33.1.0 affected —

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/nextcloud/android/pull/16896 cve-icon cve-icon
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2w7v-5299-3hw5 cve-icon cve-icon
https://hackerone.com/reports/3625210 cve-icon cve-icon
History

Mon, 01 Jun 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 01 Jun 2026 17:00:00 +0000

Type Values Removed Values Added
Description Nextcloud is an open source content collaboration platform. From version 33.0.0 to before version 33.1.0, after unlocking a locked Android phone the back-button could be used to bypass the Nextcloud Files app PIN. This issue has been patched in version 33.1.0.
Title Nextcloud: PIN bypass in PassCodeActivity via back button
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 4.6, 'vector': 'CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-01T17:53:36.647Z

Reserved: 2026-05-08T20:44:38.964Z

Link: CVE-2026-45153

cve-icon Vulnrichment

Updated: 2026-06-01T17:53:33.595Z

cve-icon NVD

Status : Deferred

Published: 2026-06-01T17:17:08.860

Modified: 2026-06-01T18:14:29.087

Link: CVE-2026-45153

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-01T18:45:34Z

Weaknesses