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CVE

CWE

Training

CVE-2021-39220

Published: Oct 25, 2021

Modified: Aug 4, 2024

PUBLISHED

CVSS v3.1

3.5

LOW

Description

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.

Vendor	Product	Versions
nextcloud	security-advisories	affected `< 1.10.4, < 1.11.0`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wm8r-rcv5

x_refsource_CONFIRM

https://github.com/nextcloud/mail/pull/5470

x_refsource_MISC

https://hackerone.com/reports/1308147

x_refsource_MISC

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