Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 99.7%; technical severity is CVSS 9.8.
vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.
Who should care
- Teams operating vBulletin
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether vBulletin is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Apply updates per vendor instructions.
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Vendor remediation
Patch and remediation links
Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-94
- Affected versions
- vBulletin vBulletin (Start Including: 5.0.0, End Including: 5.5.4)
- Published
- 24 September 2019
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 99.7%
- Signal calculated at 85
External references
- Government advisory from www.cisa.gov
- Exploit information from packetstormsecurity.com
- Exploit information from packetstormsecurity.com
- Exploit information from packetstormsecurity.com
- Exploit information from packetstormsecurity.com
- Exploit information from packetstormsecurity.com
- Exploit information from packetstormsecurity.com
- Exploit information from seclists.org
- Exploit information from arstechnica.com
- Exploit information from seclists.org
- Third-party advisory from www.theregister.co.uk