CVE-2025-27591

Published Mar 11, 2025 CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2025-7209 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.
Github GHSA Github GHSA GHSA-9mc5-7qhg-fp3w Below has Incorrect Permission Assignment for Critical Resource
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00025}

epss

{'score': 8e-05}

Type Values Removed Values Added
Metrics epss

{'score': 0.0002}

epss

{'score': 0.00025}

Type Values Removed Values Added
First Time appeared Facebook
Facebook below
Weaknesses CWE-732
CPEs cpe:2.3:a:facebook:below:*:*:*:*:*:rust:*:*
Vendors & Products Facebook
Facebook below
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
facebook
Published
Updated
Mar 21, 2025, 8:38 PM
Reserved
Mar 3, 2025, 11:36 AM
Status
Analyzed
Published
Mar 11, 2025, 7:15 PM
Modified
Jun 17, 2026, 9:03 AM