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Critical severity · published Dec 14, 2017
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…
9.8
CVSS
3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.0% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VB
Vbulletin · Vbulletin
5.0.1 through 5.3.3; 5.0.0; 5.0.0 · source: NVD
Affected product
VB
Vbulletin
Vbulletin
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-17671
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-17671
Exploit
https://blogs.securiteam.com/index.php/archives/3569
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