CVE-2019-16759
CRITICALCISA KEVEPSS 100th pctlDescription
vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
vBulletin PHP Module Remote Code Execution Vulnerability
The PHP module within vBulletin contains an unspecified vulnerability that allows for remote code execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.
Apply updates per vendor instructions.
Remediation due: 2022-05-03
References
- http://packetstormsecurity.com/files/154623/vBulletin-5.x-0-Day-Pre-Auth-Remote-Command-Execution.html
- http://packetstormsecurity.com/files/154648/vBulletin-5.x-Pre-Auth-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/155633/vBulletin-5.5.4-Remote-Command-Execution.html
- http://packetstormsecurity.com/files/158829/vBulletin-5.x-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/158830/vBulletin-5.x-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/158866/vBulletin-5.x-Remote-Code-Execution.html
- http://seclists.org/fulldisclosure/2020/Aug/5
- https://arstechnica.com/information-technology/2019/09/public-exploit-code-spawns-mass-attacks-against-high-severity-vbulletin-bug/
- https://seclists.org/fulldisclosure/2019/Sep/31
- https://www.theregister.co.uk/2019/09/24/vbulletin_vbug_zeroday/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-16759
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-07.