{"id":"CVE-2021-48011","title":"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","summary":"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() decode…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-22"],"vendor":"lukejacksonn","product":"servor","affected":["servor >= 1.0.0 <= 4.0.2"],"published":"2026-10-12","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:18:44.867","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-48011","references":[{"url":"https://github.com/lukejacksonn/servor","label":"disclosure@vulncheck.com"},{"url":"https://github.com/lukejacksonn/servor/commit/ec7d824ea6903c0fb97a452045bbb8335198cbab","label":"disclosure@vulncheck.com"},{"url":"https://github.com/lukejacksonn/servor/pull/70","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/servor-1.0.0-through-4.0.2-unauthenticated-path-traversal-via-url-encoded-dot-segments","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.0056,"epssPercentile":0.46412,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-13T15:46:24.858505Z"},"ingestedAt":"2026-10-12T22:05:40.349Z","slug":"CVE-2021-48011","body":"## Overview\n\nServor 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}