CVE-2026-45543

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

CVSS 5.3 MEDIUMEPSS 0.3%CWE-552

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 5.3EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

01 jun 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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

Produtos afetados

nextcloud · security-advisories

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Referências

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