CVE-2023-48307

low-risk
Published 2023-11-21

Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Starting in version 1.13.0 and prior to version 2.2.8 and 3.3.0, an attacker can use an unprotected endpoint in the Mail app to perform a SSRF attack. Nextcloud Mail app versions 2.2.8 and 3.3.0 contain a patch for this issue. As a workaround, disable the mail app.

Do I need to act?

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0.18% 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

Nextcloud

References (6)

Issue Tracking https://github.com/nextcloud/mail/pull/8709
Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4pp4-m...
Permissions Required https://hackerone.com/reports/1869714
Issue Tracking https://github.com/nextcloud/mail/pull/8709
Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4pp4-m...
Permissions Required https://hackerone.com/reports/1869714
22
/ 100
low-risk
Severity 16/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal