CVE-2025-27591
Below Privilege Escalation Vulnerability
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.
INFO
Published Date :
March 11, 2025, 7:15 p.m.
Last Modified :
July 3, 2025, 2:40 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Public PoC/Exploit Available at Github
CVE-2025-27591 has a 15 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-27591.
| URL | Resource |
|---|---|
| https://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3 | Patch |
| https://www.facebook.com/security/advisories/cve-2025-27591 | Patch Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2025/03/12/1 | Exploit Mailing List |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-27591 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-27591
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
a C exploit for CVE-2025-27591, which allow an attacker to escalate privilege to root.
C
None
None
Python
🔥 Local Privilege Escalation Exploit for CVE-2025-27591 | Abuses world-writable log dir in Below to gain root via /etc/passwd injection
Shell
A Proof of Concept for CVE-2025-27591, a local privilege escalation in Below < v0.9.0
bash exploit linux privilege-escalation cve-2025-27591
Shell
None
Go
walkthrough for machines
Cyber security
Python
CVE-2025-27591 is a known privilege escalation vulnerability in the Below service (version < v0.9.0)
Python
CVE-2025-27591
Shell
CVE-2025-27591 is a privilege escalation vulnerability that affected the Below service before version 0.9.0
Python
Below v0.8.1 - Local Privilege Escalation (CVE-2025-27591) - PoC Exploit
below poc poc-exploit privilege-escalation
Shell
CVE-2025-27591
Shell
Random scripts that I wrote, some updated from other people's work
Shell PHP
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-27591 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-27591 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 03, 2025
Action Type Old Value New Value Added CWE CWE-732 Added CPE Configuration OR *cpe:2.3:a:facebook:below:*:*:*:*:*:rust:*:* versions up to (excluding) 0.9.0 Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2025/03/12/1 Types: Exploit, Mailing List Added Reference Type Facebook, Inc.: https://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3 Types: Patch Added Reference Type Facebook, Inc.: https://www.facebook.com/security/advisories/cve-2025-27591 Types: Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 21, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Mar. 12, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/03/12/1 -
New CVE Received by [email protected]
Mar. 11, 2025
Action Type Old Value New Value 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. Added Reference https://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3 Added Reference https://www.facebook.com/security/advisories/cve-2025-27591