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TI-2022-13059 Aliases CVE-2022-31014

SMTP Command Injection in iCalendar Attachments to emails via newlines in Nextcloud Server

Priority MEDIUM 58CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Nextcloud server is an open source personal cloud server. Affected versions were found to be vulnerable to SMTP command injection. The impact varies based on which commands are supported by the backend SMTP server. However, the main risk here is that the attacker can then hijack an already-authenticated SMTP session and run arbitrary SMTP commands as the email user, such as sending emails to other users, changing the FROM user, and so on. As before, this depends on the configuration of the server itself, but newlines should be sanitized to mitigate such arbitrary SMTP command injection. It is recommended that the Nextcloud Server is upgraded to 22.2.8 , 23.0.5 or 24.0.1. There are no known workarounds for this issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02515 84th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed security-advisories (nextcloud): 22.2.8, 23.0.5, 24.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudsecurity-advisoriesbefore 22.2.8; 23.0.0 to before 23.0.5; 24.0.0 to before 24.0.122.2.8, 23.0.5, 24.0.1Patch availableCNA
  • security-advisories Vendornextcloud Affected before 22.2.8; 23.0.0 to before 23.0.5; 24.0.0 to before 24.0.1 Fixed in 22.2.8, 23.0.5, 24.0.1 Patch available CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*before 19.0.13.7Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*before 22.2.8Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*20.0.0 to before 20.0.14.6; 21.0.0 to before 21.0.9.5Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*23.0.0 to before 23.0.5Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:-:*:*:*:*:*:*24.0.0Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:beta1:*:*:*:*:*:*24.0.0 beta1Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:beta2:*:*:*:*:*:*24.0.0 beta2Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:beta3:*:*:*:*:*:*24.0.0 beta3Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:rc1:*:*:*:*:*:*24.0.0 rc1Vulnerablenextcloud
cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:rc2:*:*:*:*:*:*24.0.0 rc2Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* Versions before 19.0.13.7 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* Versions before 22.2.8 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* Versions 20.0.0 to before 20.0.14.6; 21.0.0 to before 21.0.9.5 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* Versions 23.0.0 to before 23.0.5 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:-:*:*:*:*:*:* Versions 24.0.0 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:beta1:*:*:*:*:*:* Versions 24.0.0 beta1 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:beta2:*:*:*:*:*:* Versions 24.0.0 beta2 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:beta3:*:*:*:*:*:* Versions 24.0.0 beta3 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:rc1:*:*:*:*:*:* Versions 24.0.0 rc1 Vulnerable ·nextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:rc2:*:*:*:*:*:* Versions 24.0.0 rc2 Vulnerable ·nextcloud
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:rc3:*:*:*:*:*:*24.0.0 rc3Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:nextcloud_server:24.0.0:rc3:*:*:*:*:*:* Versions 24.0.0 rc3 Vulnerable ·nextcloud

Remediation

  • Fix · CNA security-advisories (nextcloud) Fixed in 22.2.8, 23.0.5, 24.0.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-31014

References

Exploit 2

Patch 1

  • TI-2023-20855 Users can delete external storage mount points CVSS 3.1HIGH 7.7
  • TI-2023-11091 Nextcloud download permissions can be changed by resharer CVSS 3.1HIGH 7.5
  • TI-2023-10624 Nextcloud Server vulnerable to SSRF via filter bypass due to lax checking on IPs CVSS 3.1MEDIUM 5.3
  • TI-2025-37238 Cross-site scripting in Nextcloud CVSS 3.1MEDIUM 6.4
  • TI-2023-11086 nextcloud vulnerable to Uncontrolled Resource Consumption CVSS 3.1MEDIUM 6.5
  • TI-2022-18738 Exception logging in Sharepoint app reveals clear-text connection details CVSS 3.1MEDIUM 6.5
See all 188 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences