CVE-2021-39220
low-risk
Published 2021-10-25
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.
Do I need to act?
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0.26% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.5/10
Low
NETWORK
/ LOW complexity
Affected Products (1)
Mail
Affected Vendors
References (6)
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-w...
Permissions Required
https://hackerone.com/reports/1308147
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-w...
Permissions Required
https://hackerone.com/reports/1308147
22
/ 100
low-risk
Severity
16/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal