What’s Vulnerable › Vulnerabilities

CVE-2019-16759: vBulletin PHP Module Remote Code Execution Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 99.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-09-24 · updated 2026-06-17
• Weakness: CWE-94

Description

vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.

Affected products

• vBulletin: from 5.0.0 through 5.5.4

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/
• 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

Get alerted when CVE-2019-16759 or the next vulnerability affects your stack