CVE-2023-45660

low-risk
Published 2023-10-16

Nextcloud mail is an email app for the Nextcloud home server platform. In affected versions a missing check of origin, target and cookies allows for an attacker to abuse the proxy endpoint to denial of service a third server. It is recommended that the Nextcloud Mail is upgraded to 2.2.8 or 3.3.0. There are no known workarounds for this vulnerability.

Do I need to act?

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0.13% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Mail

Affected Vendors

Nextcloud

References (6)

Issue Tracking https://github.com/nextcloud/mail/pull/8459
Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8j9x-f...
Third Party Advisory https://hackerone.com/reports/1895874
Issue Tracking https://github.com/nextcloud/mail/pull/8459
Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8j9x-f...
Third Party Advisory https://hackerone.com/reports/1895874
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal