CVE-2022-24838
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 33.0%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 33.02% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- nextcloud/calendar
- Source
- security-advisories@github.com
EPSS 33.0% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/nextcloud/calendar/commit/7b70edfb8a0fcf0926f613ababcbd56c6ecd9f35Patch, Third Party Advisory
- https://github.com/nextcloud/calendar/pull/4073Patch, Third Party Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8xv5-4855-24qfThird Party Advisory
- https://github.com/nextcloud/calendar/commit/7b70edfb8a0fcf0926f613ababcbd56c6ecd9f35Patch, Third Party Advisory
- https://github.com/nextcloud/calendar/pull/4073Patch, Third Party Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8xv5-4855-24qfThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.