CVE-2026-45543

Nextcloud: Deleting a Forms collaborator share leaves uploaded response files accessible through a lingering Files share

Published Jun 1, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for forms where that user previously had results access. This issue has been patched in version 5.2.7.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:nextcloud:forms:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Nextcloud
Nextcloud forms
Vendors & Products Nextcloud
Nextcloud forms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for forms where that user previously had results access. This issue has been patched in version 5.2.7.
Title Nextcloud: Deleting a Forms collaborator share leaves uploaded response files accessible through a lingering Files share
Weaknesses CWE-552
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 1, 2026, 7:33 PM
Reserved
May 12, 2026, 5:48 PM
Status
Analyzed
Published
Jun 1, 2026, 7:16 PM
Modified
Jul 22, 2026, 8:10 AM