CVE-2021-48011CWE-22path-traversal

CVE-2021-48011

High · published October 13, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
45.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00560 · 45.8th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-10-13T01:17Z
References (4)
https://github.com/lukejacksonn/servor · [email protected]https://github.com/lukejacksonn/servor/commit/ec7d824ea6903c0fb97a452045bbb8335198cbab · [email protected]https://github.com/lukejacksonn/servor/pull/70 · [email protected]https://www.vulncheck.com/advisories/servor-1.0.0-through-4.0.2-unauthenticated-path-traversal-via-url-encoded-dot-segments · [email protected]
EPSS history
Timeline
  • 14 OCT 03:15Z
    EPSS moved — → 1%
    epss
  • 12 OCT 20:55Z
    Servor 1.0.0 through 4.0.2 Unauthenticated Path Traversal via URL-Encoded Dot Segments
    cvelistv5
  • 12 OCT 20:55Z
    Servor 1.0.0 through 4.0.2 Unauthenticated Path Traversal via URL-Encoded Dot Segments
    cvelistv5