Vulnerability · Published Mar 11, 2025 · Assigned by facebook
CVE-2025-27591
Medium 6.8
In plain English
A medium-severity security flaw in below from Meta Platforms, Inc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.4%top 68.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Meta Platforms, Inc | below | 0.0.0 – before 0.9.0 |