CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- vBulletin PHP Module Remote Code Execution Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
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: vbulletin
References10
- packetstormsecurity.com/files/154623/vBulletin-5.x-0-Day-Pre-Au… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/154648/vBulletin-5.x-Pre-Auth-Rem… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/155633/vBulletin-5.5.4-Remote-Com… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/158829/vBulletin-5.x-Remote-Code-… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/158830/vBulletin-5.x-Remote-Code-… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/158866/vBulletin-5.x-Remote-Code-… ExploitThird Party AdvisoryVDB Entry
- seclists.org/fulldisclosure/2020/Aug/5 ExploitMailing ListThird Party Advisory
- arstechnica.com/information-technology/2019/09/public-exploit-c… ExploitPress/Media CoverageThird Party Advisory
- seclists.org/fulldisclosure/2019/Sep/31 ExploitMailing ListThird Party Advisory
- packetstormsecurity.com/files/154623/vBulletin-5.x-0-Day-Pre-Au… ExploitThird Party AdvisoryVDB Entry
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 100% percentile: 100 · as of 10 November 2026
- CWE
- CWE-94
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