Published: 25/10/2021 Updated: 05/08/2022

CVSS v2 Base Score: 3.5 | Impact Score: 2.9 | Exploitability Score: 6.8

CVSS v3 Base Score: 3.5 | Impact Score: 1.4 | Exploitability Score: 2.1

VMScore: 312

Vector: AV:N/AC:M/Au:S/C:P/I:N/A:N

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.

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nextcloud mail

The Nextcloud Mail application prior to versions 1104 and 1110 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 ...

CWE-20 https://github.com/nextcloud/mail/pull/5470 https://hackerone.com/reports/1308147 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wm8r-rcv5 https://nvd.nist.gov https://security.archlinux.org/CVE-2021-39220

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CVE-2021-39220

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