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TI-2017-12935 Aliases CVE-2017-17672GHSA-fxrf-cmv6-rm5j

In vBulletin through 5.3.x, there is an unauthenticated deserialization vulnerability…

Priority MEDIUM 58CWE-502Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-502.

Summary

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.

Why it matters now

EPSS 0.15189 96th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA and 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 · 3

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: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

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-17672
  2. 2026-10-03 Alias added: GHSA-fxrf-cmv6-rm5j

References

Exploit 2

  • 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