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Critical 9.8Known exploited (CISA KEV)Published Sep 24, 2019
CVE-2019-16759vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.
Updated under an hour ago ()
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It affects vbulletin. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.
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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
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 99.73% (percentile 100)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
vbulletin vbulletin vbulletin:vbulletin | from 5.0.0 through 5.5.4 | NVD |
References
- https://seclists.org/fulldisclosure/2019/Sep/31x-refsource-misc, exploit, mailing-list, third-party-advisory
- https://www.theregister.co.uk/2019/09/24/vbulletin_vbug_zeroday/x-refsource-misc, press/media-coverage, third-party-advisory
- https://arstechnica.com/information-technology/2019/09/public-exploit-code-spawns-mass-attacks-against-high-severity-vbulletin-bug/x-refsource-misc, exploit, press/media-coverage, third-party-advisory
- http://packetstormsecurity.com/files/154623/vBulletin-5.x-0-Day-Pre-Auth-Remote-Command-Execution.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/154648/vBulletin-5.x-Pre-Auth-Remote-Code-Execution.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/155633/vBulletin-5.5.4-Remote-Command-Execution.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/158830/vBulletin-5.x-Remote-Code-Execution.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/158829/vBulletin-5.x-Remote-Code-Execution.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- http://seclists.org/fulldisclosure/2020/Aug/5mailing-list, x-refsource-fulldisc, exploit, third-party-advisory
- http://packetstormsecurity.com/files/158866/vBulletin-5.x-Remote-Code-Execution.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-16759us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.