RCE in Vbulletin
CVE-2019-16759
vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.997 (100.0th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.997 · newest: 0.997 · change: 0.000
Affected products
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- seclists.org/fulldisclosure/2019/Sep/31 (Exploit, Mailing List, Third Party Advisory)
- www.theregister.co.uk/2019/09/24/vbulletin_vbug_zeroday/ (Third Party Advisory, Press/Media Coverage)
- arstechnica.com/information-technology/2019/09/public-exploit-code-spawns-mass-… (Exploit, Third Party Advisory, Press/Media Coverage)
- packetstormsecurity.com/files/154623/vBulletin-5.x-0-Day-Pre-Auth-Remote-Comman… (Exploit, VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/154648/vBulletin-5.x-Pre-Auth-Remote-Code-Executi… (Exploit, VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/155633/vBulletin-5.5.4-Remote-Command-Execution.h… (Exploit, VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/158830/vBulletin-5.x-Remote-Code-Execution.html (Exploit, VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/158829/vBulletin-5.x-Remote-Code-Execution.html (Exploit, VDB Entry, Third Party Advisory)
- seclists.org/fulldisclosure/2020/Aug/5 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/158866/vBulletin-5.x-Remote-Code-Execution.html (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-16759?
- CVE-2019-16759 is a critical-severity vulnerability in Vbulletin, classified under Code Injection. CVSS score: 9.8/10. Published 2019-09-24.
- How severe is CVE-2019-16759?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-16759 known to be exploited?
- Yes. CVE-2019-16759 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 77 public proof-of-concept repositories are indexed.