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CVE-2017-17671

nvd nist
Published: Dec 14, 2017Modified: May 13, 2026

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9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 5.9
Source: NVD

Description

vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\ traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of ".." to reach an Apache HTTP Server log file.

Affected (3)

Products: Vbulletin: Vbulletin
Vbulletin
1 product
Vbulletin
Configuration A
3 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Vbulletin
Vbulletin
From 5.0.1 to 5.3.3
Vbulletin
Version 5.0.0 beta_11
Vbulletin
Version 5.0.0 beta_28
Running on/withPlatform Versions
Microsoft
Windows
All versions

Related CWEs

CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (2)

Source: cve@mitre.org
ExploitThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitThird Party Advisory

Timeline

No history available yet.