CVE-2022-24838

Command Injection in Appointment Emails for Nextcloud Calendar

Description

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 6.03% Top 10%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8xv5-4855-24qf third party advisory
https://github.com/nextcloud/calendar/pull/4073 third party advisory patch
https://github.com/nextcloud/calendar/commit/7b70edfb8a0fcf0926f613ababcbd56c6ecd9f35 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2022-24838?
CVE-2022-24838 has been scored as a medium severity vulnerability.
How to fix CVE-2022-24838?
To fix CVE-2022-24838, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-24838 being actively exploited in the wild?
It is possible that CVE-2022-24838 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-24838?
CVE-2022-24838 affects nextcloud security-advisories.
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