CVE-2016-2056 describes a critical command injection vulnerability in Xymon versions 4.1.x, 4.2.x, and 4.3.x before 4.3.25. Remote authenticated users can execute arbitrary commands by injecting shell metacharacters into the adduser_name argument within the web/useradm.c or web/chpasswd.c components. This vulnerability carries a high CVSS score of 8.8, indicating a severe risk due to its network-based attack vector, low attack complexity, and high potential for confidentiality, integrity, and availability impacts. The EPSS score of 0.56347 further highlights its exploitability. While not listed on the KEV catalog, exploit code is publicly available, including a Metasploit module (Xymon useradm Command Execution) and an ExploitDB entry (EDB-47114). Despite this, there is no evidence of active exploitation, and community discussion and media coverage are minimal.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.1.0CPE matchmatch criteria | cpe:2.3:a:xymon:xymon:4.1.0:*:*:*:*:*:*:* | ||
4.1.1CPE matchmatch criteria | cpe:2.3:a:xymon:xymon:4.1.1:*:*:*:*:*:*:* | ||
4.1.2CPE matchmatch criteria | cpe:2.3:a:xymon:xymon:4.1.2:*:*:*:*:*:*:* | ||
4.1.2CPE matchmatch criteria | cpe:2.3:a:xymon:xymon:4.1.2:p1:*:*:*:*:*:* | ||
4.1.2CPE matchmatch criteria | cpe:2.3:a:xymon:xymon:4.1.2:p2:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.