Vulnerability Details CVE-2017-17671
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.014
EPSS Ranking 79.1%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 7.5
References
Products affected by CVE-2017-17671
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cpe:2.3:a:vbulletin:vbulletin:5.0.0
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cpe:2.3:a:vbulletin:vbulletin:5.0.1
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cpe:2.3:a:vbulletin:vbulletin:5.0.2
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cpe:2.3:a:vbulletin:vbulletin:5.0.3
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cpe:2.3:a:vbulletin:vbulletin:5.0.4
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cpe:2.3:a:vbulletin:vbulletin:5.0.5
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cpe:2.3:a:vbulletin:vbulletin:5.1.0
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cpe:2.3:a:vbulletin:vbulletin:5.1.1
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cpe:2.3:a:vbulletin:vbulletin:5.1.2
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cpe:2.3:a:vbulletin:vbulletin:5.1.3
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cpe:2.3:a:vbulletin:vbulletin:5.1.4
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cpe:2.3:a:vbulletin:vbulletin:5.1.5
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cpe:2.3:a:vbulletin:vbulletin:5.1.6
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cpe:2.3:a:vbulletin:vbulletin:5.2.0
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cpe:2.3:a:vbulletin:vbulletin:5.2.1
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cpe:2.3:a:vbulletin:vbulletin:5.2.2
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cpe:2.3:a:vbulletin:vbulletin:5.2.4
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cpe:2.3:a:vbulletin:vbulletin:5.2.5
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cpe:2.3:a:vbulletin:vbulletin:5.2.6
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cpe:2.3:a:vbulletin:vbulletin:5.3.2
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cpe:2.3:a:vbulletin:vbulletin:5.3.3
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cpe:2.3:o:microsoft:windows:-