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CVE-2023-23943

Blind SSRF via server URL input in the Nextcloud Mail app

Published: Feb 6, 2023Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-918
NVD MITRE
5.0CVSSMEDIUM
EPSS Score
0.9%
Top 44.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Nextcloud mail is an email app for the nextcloud home server platform. In affected versions the SMTP, IMAP and Sieve host fields allowed to scan for internal services and servers reachable from within the local network of the Nextcloud Server. It is recommended that the Nextcloud Maill app is upgraded to 1.15.0 or 2.2.2. The only known workaround for this issue is to completely disable the nextcloud mail app.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-918

Affected Products

mailnextcloud
On-prem
Cloud & SaaS / saas-application
security-advisoriesnextcloud
SaaSSaaS Service
Cloud & SaaS / saas-application
Nextcloud mailNextcloud GmbH
SaaS
Cloud & SaaS / saas-application
nextcloudoss-projectDECloud & SaaSaka nextcloud server
nextcloud gmbhcommercialDECloud & SaaSaka nextcloud server, nextcloud enterprise server, nextcloud calendar

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://github.com/nextcloud/mail/pull/7796
github.com
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8gcx-r739-9pf6
github.com
https://hackerone.com/reports/1736390
hackerone.com
and 3 more references View all →

Timeline

Published
Feb 6, 2023
Last Updated
Nov 21, 2024

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