Vulnerability Report

CVE-2021-39220

Title: Nextcloud Mail Improper Input Validation

Improper Input Validation

Proof Of Concept

No public PoC currently indexed for CVE-2021-39220.

CWE Category CWE-20
Published Date Oct 25, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 3.5 CVSS v3.1
Exploit Probability (EPSS)
0.78%

Vulnerability Summary

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.

Impacted Vendors

C
chilkat_software 1
P
pear 1
B
basercms 1
N
nextcloud 1

Reference Links

https://github.com/nextcloud/mail/pull/5470 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wm8r-rcv5 https://hackerone.com/reports/1308147 https://github.com/nextcloud/mail/pull/5470 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wm8r-rcv5 https://hackerone.com/reports/1308147
CVSS v3.1
Source Entity [email protected]
Severity LOW
3.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CVSS v2.0
Source Entity [email protected]
Severity LOW
3.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:M/Au:S/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-39220 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Affected Stack

No specific products linked.