CVE-2026-45543

MEDIUM EPSS 18.5%
Published Jun 1, 20264w ago · Modified Jun 17, 20261w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Jun 1, 2026 4w ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
18.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-552

Affected Products 1

VendorProductVersionRange
nextcloudforms*≥4.3.0  –  <5.2.7

References 3

  • github.com https://github.com/nextcloud/forms/pull/3291
    Issue TrackingPatch
  • github.com https://github.com/nextcloud/security-advisories/security/advisories/GHSA-q4fw-6jf8-5vhh
    MitigationVendor Advisory
  • hackerone.com https://hackerone.com/reports/3617352
    Permissions Required

Remediation

  • github.com https://github.com/nextcloud/forms/pull/3291
    Issue TrackingPatch