CVE-2017-17671
9.8 · CRITICALOverview
CVE-2017-17671 is a critical-severity vulnerability affecting vbulletin vbulletin. It was published on December 14, 2017 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from vbulletin. Update vbulletin to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| vbulletin | vbulletin | 5.0.1 | Affected |
Frequently Asked Questions
What is CVE-2017-17671?
CVE-2017-17671 is a critical-severity vulnerability affecting vbulletin vbulletin. It was published on December 14, 2017 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2017-17671?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2017-17671?
Check the references section for vendor advisories and patches from vbulletin. Update vbulletin to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2017-17671?
CyberStrike's AI-powered security agents can automatically detect CVE-2017-17671 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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