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.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.4, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required requiring only low-level privileges . The vulnerability impacts limited data confidentiality, limited integrity, for affected systems. Impacting 1 product from nextcloud organizations running these solutions should prioritize assessment and patching.
Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2022-07-05T18:15:07.937
2024-11-21T07:03:42.933
Modified
CVSSv3.1: 5.4 (MEDIUM)
AV:N/AC:M/Au:S/C:N/I:P/A:N
6.8
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | nextcloud | nextcloud_server | < 19.0.13.7 | Yes |
| Application | nextcloud | nextcloud_server | < 22.2.8 | Yes |
| Application | nextcloud | nextcloud_server | < 20.0.14.6 | Yes |
| Application | nextcloud | nextcloud_server | < 21.0.9.5 | Yes |
| Application | nextcloud | nextcloud_server | < 23.0.5 | Yes |
| Application | nextcloud | nextcloud_server | 24.0.0 | Yes |
| Application | nextcloud | nextcloud_server | 24.0.0 | Yes |
| Application | nextcloud | nextcloud_server | 24.0.0 | Yes |
| Application | nextcloud | nextcloud_server | 24.0.0 | Yes |
| Application | nextcloud | nextcloud_server | 24.0.0 | Yes |
| Application | nextcloud | nextcloud_server | 24.0.0 | Yes |
| Application | nextcloud | nextcloud_server | 24.0.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For nextcloud's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.