Critical severity · published Nov 21, 2023
CVE-2023-48307
Nextcloud Mail app vulnerable to Server-Side Request Forgery
9.8
CVSS
0.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-advisories · nextcloud
>= 1.13.0, < 2.2.8; >= 3.1.0, < 3.3.0 · source: vendor
MA
Mail · Nextcloud
1.13.0 before 2.2.8; 3.0.0 before 3.3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-48307
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-48307
Issue Tracking
https://github.com/nextcloud/mail/pull/8709
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4pp4-m8ph-2999
Permissions Required
https://hackerone.com/reports/1869714
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