THREATPORT/VULNERABILITY/CVE-2017-17672
CRITICAL SEVERITY

CVE-2017-17672

Vbulletin vulnerability

CVSS
9.8
EPSS
14.9%
EPSS pct
96th
Exploited
No known
In vBulletin through 5.3.x, there is an unauthenticated deserialization vulnerability that leads to arbitrary file deletion and, under certain circumstances, code execution, because of unsafe usage of PHP's unserialize() in vB_Library_Template's cacheTemplates() function, which is a publicly exposed API. This is exploited with the templateidlist parameter to ajax/api/template/cacheTemplates.
Affected vendor
Vbulletin
Affected product
Vbulletin
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-502 — Deserialization of Untrusted Data
Published
2017-12-14

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 14.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2017-17672

  • Confirm whether Vbulletin Vbulletin is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-17672.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-17672

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-17672 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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