GHSA-9mc5-7qhg-fp3w · Severity: high · Ecosystem: rust — Below has Incorrect Permission Assignment for Critical Resource
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.
Conclusion & alert: CVE-2025-27591 is rated Exploit Available (52.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.11%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-04-19 | 0.04% | 0.11% | +0.07% |
| 2 | 2025-03-12 | — | 0.04% | — |
Full EPSS history (2 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.8 | 3.1 | MEDIUM |
|
2.5 | 4.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-9mc5-7qhg-fp3w · Severity: high · Ecosystem: rust — Below has Incorrect Permission Assignment for Critical Resource
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-27591: 1 source package rows (below); 3 state rows across 3 repos (3.22-community, 3.23-community, edge-community); fixed 0, open 3. | https://security.alpinelinux.org/vuln/CVE-2025-27591 |
| URL | Tags |
|---|---|
| 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 |