Read the docs
TI-2017-12934 Aliases CVE-2017-17671GHSA-6378-4h5g-h5vx

vBulletin through 5.3.x on Windows allows remote PHP code execution because a…

Priority MEDIUM 48CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.0305 87th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:*5.0.1 – 5.3.3VulnerablevBulletin
cpe:2.3:a:vbulletin:vbulletin:5.0.0:beta_11:*:*:*:*:*:*5.0.0 beta_11VulnerablevBulletin
cpe:2.3:a:vbulletin:vbulletin:5.0.0:beta_28:*:*:*:*:*:*5.0.0 beta_28VulnerablevBulletin
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:* Versions 5.0.1 – 5.3.3 Vulnerable ·vBulletin
  • cpe:2.3:a:vbulletin:vbulletin:5.0.0:beta_11:*:*:*:*:*:* Versions 5.0.0 beta_11 Vulnerable ·vBulletin
  • cpe:2.3:a:vbulletin:vbulletin:5.0.0:beta_28:*:*:*:*:*:* Versions 5.0.0 beta_28 Vulnerable ·vBulletin
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-17671
  2. 2026-10-03 Alias added: GHSA-6378-4h5g-h5vx

References

Exploit 1

  • TI-2020-13248 vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWidgets data… KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-12540 vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code]… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-31014 vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to… CVSS 3.1CRITICAL 10.0
  • TI-2020-10114 vBulletin before 5.5.6pl1, 5.6.0 before 5.6.0pl1, and 5.6.1 before 5.6.1pl1 has incorrect access control. CVSS 3.1CRITICAL 9.8
  • TI-2023-10600 vBulletin before 5.6.9 PL1 allows an unauthenticated remote attacker to execute arbitrary… CVSS 3.1CRITICAL 9.8
  • TI-2016-05317 SQL injection vulnerability in forumrunner/includes/moderation.php in vBulletin before… CVSS 3.0CRITICAL 9.8
See all 49 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences