CVE-2025-27591
A privilege escalation vulnerability existed in the Below service prior to v0.9.0 due to the creation of a world-writable directory at /var/log/below. This...
- Published
- Mar 11, 2025
- Updated
- Mar 21, 2025
- Assigning CNA
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:NLow · next 30 days
- Percentile
- 30.2%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
A privilege escalation vulnerability existed in the Below service prior to v0.9.0 due to the creation of a world-writable directory at /var/log/below. This could have allowed local unprivileged users to escalate to root privileges through symlink attacks that manipulate files such as /etc/shadow.
Sources
19- CVE-2025-27591Exploit
🔥 Local Privilege Escalation Exploit for CVE-2025-27591 | Abuses world-writable log dir in Below to gain root via /etc/passwd injection
A Bash-based privilege escalation exploit targeting the `below` system performance monitoring tool. This refurbished exploit leverages a symlink vulnerability in the logging mechanism to inject a root user into `/etc/passwd`, achieving full root access.
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.