Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

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
< 5.2.6 affected —

No data.

No data.

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No data.

Project Subscriptions

No data.

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/forms/pull/3269 cve-icon cve-icon
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r4gh-f8x6-m55f cve-icon cve-icon
https://hackerone.com/reports/3628817 cve-icon cve-icon
History

Mon, 01 Jun 2026 19:15:00 +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. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.
Title Nextcloud: Missing permission check for from submissions
Weaknesses CWE-200
CWE-862
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-01T18:12:23.278Z

Reserved: 2026-05-11T18:41:13.156Z

Link: CVE-2026-45267

cve-icon Vulnrichment

Updated: 2026-06-01T18:12:18.796Z

cve-icon NVD

Status : Deferred

Published: 2026-06-01T17:17:09.963

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

Link: CVE-2026-45267

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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

Weaknesses