CVE-2022-24838CWE-74

Command Injection in Appointment Emails for Nextcloud Calendar

Medium · published April 11, 2022

CVSS v3.1

5.3

EPSS

33%

Percentile

98.4

In the wild

Unconfirmed

What it is

Nextcloud Calendar is a calendar application for the nextcloud framework. SMTP Command Injection in Appointment Emails via Newlines: as newlines and special characters are not sanitized in the email value in the JSON request, a malicious attacker can inject newlines to break out of the `RCPT TO:<BOOKING USER'S EMAIL> ` SMTP command and begin injecting arbitrary SMTP commands. It is recommended that Calendar is upgraded to 3.2.2. There are no workaround available.

The record

Technical detail

CVSS v3.1: 5.3 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0: Not supplied
EPSS: 0.33020 · 98.4th percentile
Weakness: CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published: 2022-04-11T20:25Z

EPSS history

Timeline

11 APR 20:25Z
Command Injection in Appointment Emails for Nextcloud Calendar
cvelistv5