CVE-2021-39220

Bypass of image blocking in Nextcloud Mail

CVSS 3.5 LOWEPSS 0.8%CWE-20 CWE-200

Vexday Risk Score

8Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 3.5EPSS 0.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

25 oct 2021Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

Nextcloud is an open-source, self-hosted productivity platform The Nextcloud Mail application prior to versions 1.10.4 and 1.11.0 does by default not render images in emails to not leak the read state or user IP. The privacy filter failed to filter images with a relative protocol. It is recommended that the Nextcloud Mail application is upgraded to 1.10.4 or 1.11.0. There are no known workarounds aside from upgrading.

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

Productos afectados

nextcloud · security-advisories

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Referencias

https://github.com/nextcloud/mail/pull/5470 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wm8r-rcv5 https://hackerone.com/reports/1308147