Vulnerability 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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | < 1.10.4 |
Related Weaknesses (CWE)
References
- https://github.com/nextcloud/mail/pull/5470PatchThird Party Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wThird Party Advisory
- https://hackerone.com/reports/1308147Permissions Required
- https://github.com/nextcloud/mail/pull/5470PatchThird Party Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wThird Party Advisory
- https://hackerone.com/reports/1308147Permissions Required
FAQ
What is CVE-2021-39220?
CVE-2021-39220 is a vulnerability with a CVSS score of 3.5 (LOW). 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...
How severe is CVE-2021-39220?
CVE-2021-39220 has been rated LOW with a CVSS base score of 3.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-39220?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Mail.