Vulnerability Details : CVE-2022-24838
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.
Products affected by CVE-2022-24838
- cpe:2.3:a:nextcloud:calendar:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-24838
6.03%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 90 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-24838
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2022-24838
-
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
-
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.Assigned by: nvd@nist.gov (Primary)
References for CVE-2022-24838
-
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8xv5-4855-24qf
Command Injection in Appointment Emails for Calendar · Advisory · nextcloud/security-advisories · GitHubThird Party Advisory
-
https://github.com/nextcloud/calendar/pull/4073
Add email validation and testing for appointments booking by miaulalala · Pull Request #4073 · nextcloud/calendar · GitHubPatch;Third Party Advisory
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https://github.com/nextcloud/calendar/commit/7b70edfb8a0fcf0926f613ababcbd56c6ecd9f35
Add email validation and testing for booking · nextcloud/calendar@7b70edf · GitHubPatch;Third Party Advisory
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