Path Traversal in Lukejacksonn Servor
CVE-2021-48011
Servor 1.0.0 through 4.0.2 contains a path traversal vulnerability that allows unauthenticated remote attackers to escape the served root by sending URL-encoded dot segments. Attackers can send %2e%2e/ sequences, which decodeURI() decodes before path.join() in serveStaticFile and serveDirectoryListing, to read arbitrary files and list directories outside the root.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/lukejacksonn/servor/pull/70 (issue-tracking, patch)
- github.com/lukejacksonn/servor/commit/ec7d824ea6903c0fb97a452045bbb8335198cbab (patch)
- github.com/lukejacksonn/servor (product)
- www.vulncheck.com/advisories/servor-1.0.0-through-4.0.2-unauthenticated-path-tr… (third-party-advisory)
Frequently asked questions
- What is CVE-2021-48011?
- CVE-2021-48011 is a high-severity vulnerability in Lukejacksonn Servor, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-10-12.
- How severe is CVE-2021-48011?
- High severity. CVSS v3 base score is 7.5 out of 10.