CVE-2021-32707

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    CVE-2021-32707

    Published: 12 Jul 2021Last Modified: 9 Jul 2026

    Summary:

    Details: Nextcloud Mail is a mail app for Nextcloud. In versions prior to 1.9.6, the Nextcloud Mail application does not, by default, render images in emails to not leak the read state. The privacy filter failed to filter images with a `background-image` CSS attribute. Note that the images were still passed through the Nextcloud image proxy, and thus there was no IP leakage. The issue was patched in version 1.9.6 and 1.10.0. No workarounds are known to exist.

    References: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xxp4-44xc-8crh, https://github.com/nextcloud/mail/pull/5189, https://hackerone.com/reports/1215251

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -c1c6274efb4d73de062c5b6e3da2b66f0788beb5

    Affected versions

    v1.9.5
    v1.9.4
    v1.9.3
    v1.9.2
    v1.9.1
    v1.9.0
    v1.9.0-alpha3
    v1.9.0-alpha2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-32707 | CVE-DB