CVE-2026-45543

5.3 mediumEPSS 0.3%

Medium (5.3) in nextcloud forms. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-31)
CWE: CWE-552
Published: 2026-06-01
Modified: 2026-07-22
Record from: the NVD, synced 2026-10-19

Affected

nextcloud:forms

References

https://github.com/nextcloud/forms/pull/3291
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-q4fw-6jf8-5vhh
https://hackerone.com/reports/3617352

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