Vulnerability Details : CVE-2021-39220

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.
Published 2021-10-25 19:15:10
Updated 2022-08-05 11:05:59
Source GitHub, Inc.
View at NVD,   CVE.org
Vulnerability category: Input validationInformation leak

Products affected by CVE-2021-39220

Exploit prediction scoring system (EPSS) score for CVE-2021-39220

EPSS FAQ
0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 23 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-39220

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.5
 LOW AV:N/AC:M/Au:S/C:P/I:N/A:N
6.8
2.9
 NIST
3.5
 LOW CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
2.1
1.4
 GitHub, Inc.

CWE ids for CVE-2021-39220

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by:
    • nvd@nist.gov (Primary)
    • security-advisories@github.com (Secondary)
  • The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
    Assigned by: security-advisories@github.com (Secondary)

References for CVE-2021-39220

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