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CVE-2026-67599 is an OS command injection vulnerability in ClearOS 7.9 affecting the Log Viewer component. The flaw is caused by unsanitized user-controlled input supplied through the filter parameter being interpolated directly into a shell command in File.php. An authenticated attacker can inject command substitution payloads into this parameter to execute arbitrary operating system commands in the context of the webconfig user. Because the webconfig user is granted extensive NOPASSWD sudo privileges by default, successful exploitation can be chained directly into privilege escalation to root.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a small standalone exploit repo containing one Python proof-of-concept script and a README documenting CVE-2026-67599, an authenticated OS command injection in ClearOS Webconfig's log viewer. The Python entry point, CVE-2026-67599.py, uses requests.Session to authenticate to the ClearOS Webconfig login endpoint on HTTPS port 81, captures the ci_csrf_token cookie, then submits a second POST to /app/log_viewer/index with file=system and a malicious filter parameter containing shell command substitution syntax $(...). The operator can supply arbitrary commands with -c; the default command writes an artifact to /tmp/lazytitanwazhere. The exploit is operational rather than a mere detector because it performs the full login-and-trigger sequence and supports arbitrary command execution. The README expands on impact, identifies the vulnerable backend file (/usr/clearos/apps/base/libraries/File.php), and demonstrates post-exploitation including a reverse shell and privilege escalation from the webconfig account to root using permissive default sudoers rules, notably via sudo tar. Overall, the repository's purpose is to provide a working authenticated RCE PoC and supporting vulnerability write-up for ClearOS 7.9.1.342252.
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