Actively exploited · Published Sep 24, 2019 · Assigned by mitre
CVE-2019-16759
Critical 9.8 Exploited
In plain English
A critical-severity code injection in vBulletin from vBulletin. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 99.7% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code. Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by May 3, 2022.
Official 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 (as reported)
Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://seclists.org/fulldisclosure/2019/Sep/31 x_refsource_MISC
- https://www.theregister.co.uk/2019/09/24/vbulletin_vbug_zeroday/ x_refsource_MISC
- https://arstechnica.com/information-technology/2019/09/public-exploit-code-spawns-mass-attacks-against-high-severity-vbulletin-bug/ x_refsource_MISC
- http://packetstormsecurity.com/files/154623/vBulletin-5.x-0-Day-Pre-Auth-Remote-Command-Execution.html x_refsource_MISC
- http://packetstormsecurity.com/files/154648/vBulletin-5.x-Pre-Auth-Remote-Code-Execution.html x_refsource_MISC
- http://packetstormsecurity.com/files/155633/vBulletin-5.5.4-Remote-Command-Execution.html x_refsource_MISC
- http://packetstormsecurity.com/files/158830/vBulletin-5.x-Remote-Code-Execution.html x_refsource_MISC
- http://packetstormsecurity.com/files/158829/vBulletin-5.x-Remote-Code-Execution.html x_refsource_MISC
- 20200811 Remote Code Execution 0day in vBulletin 5.x mailing-list, x_refsource_FULLDISC
- http://packetstormsecurity.com/files/158866/vBulletin-5.x-Remote-Code-Execution.html x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-16759 government-resource