{"cve":"CVE-2025-27591","nvd":{"published":"2025-03-11T19:15:43.390","modified":"2026-06-17T09:03:52.557","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","score":6.8},"cwes":["CWE-732"],"references":["https://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3","https://www.facebook.com/security/advisories/cve-2025-27591","http://www.openwall.com/lists/oss-security/2025/03/12/1"],"products":["facebook:below"],"source":"nvd","synced_at":"2026-10-19T22:00:17.429720821+00:00"},"epss":{"cve":"CVE-2025-27591","score":0.00372,"percentile":0.31127,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9mc5-7qhg-fp3w","url":"https://osv.dev/vulnerability/GHSA-9mc5-7qhg-fp3w","summary":"Below has Incorrect Permission Assignment for Critical Resource","modified":"2026-02-08T01:20:45.748583Z","packages":[{"ecosystem":"crates.io","name":"below","purl":"pkg:cargo/below","ranges":["<0.9.0"],"fixed":["0.9.0"]}]},{"id":"RUSTSEC-2025-0149","url":"https://osv.dev/vulnerability/RUSTSEC-2025-0149","summary":"World Writable Directory in /var/log/below Allows Local Privilege Escalation","modified":"2026-02-08T07:26:28Z","packages":[{"ecosystem":"crates.io","name":"below","purl":"pkg:cargo/below","ranges":[">=0.0.0-0 <0.9.0"],"fixed":["0.9.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}