CVE-2019-16759
Published: November 3, 2021
Official Description
The PHP module within vBulletin contains an unspecified vulnerability that allows for remote code execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.
CISA KEV Advisory
vBulletin PHP Module Remote Code Execution Vulnerability
The PHP module within vBulletin contains an unspecified vulnerability that allows for remote code execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.
Apply updates per vendor instructions.
Risk Analysis
A critical remote code execution vulnerability exists in the PHP module of vBulletin, allowing attackers to execute arbitrary code. The high EPSS score and its presence in CISA's KEV catalog underscore the urgency and confirmed exploitation of this flaw. This can lead to complete compromise of the affected vBulletin instance.
This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog, indicating a high probability of attack. Exploitation occurs via a specific parameter in an ajax/render/widget_php routestring request, suggesting remote exploitability.
VBulletin users should apply the latest security patches immediately to address this remote code execution vulnerability. It is also advisable to review and restrict access to administrative interfaces and ensure proper input sanitization.
Technical Analysis
CVE-2019-16759 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2019-16759 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-16759 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1