CVE-2021-48011

Servor 1.0.0 through 4.0.2 Unauthenticated Path Traversal via URL-Encoded Dot Segments

Published Oct 12, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Lukejacksonn
Lukejacksonn servor
Vendors & Products Lukejacksonn
Lukejacksonn servor
Type Values Removed Values Added
Description 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.
Title Servor 1.0.0 through 4.0.2 Unauthenticated Path Traversal via URL-Encoded Dot Segments
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 13, 2026, 3:46 PM
Reserved
Oct 12, 2026, 7:27 PM
Status
Deferred
Published
Oct 12, 2026, 9:17 PM
Modified
Oct 16, 2026, 7:18 PM