CVE-2020-17496: vBulletin PHP Module Remote Code Execution Vulnerability
Description
CVE-2020-17496 is a high-severity remote code execution vulnerability in the PHP module of vBulletin. It is triggered via crafted subWidgets data in an ajax/render/widget_tabbedcontainer_tab_panel request. This vulnerability resolves an incomplete patch from a previous CVE (CVE-2019-16759) and has been exploited in the wild.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The PHP module within vBulletin contains a remote code execution vulnerability identified as CVE-2020-17496. This flaw is exploitable through specially crafted subWidgets data sent in an ajax/render/widget_tabbedcontainer_tab_panel request. The vulnerability addresses an incomplete fix for CVE-2019-16759. Exploitation allows attackers to execute arbitrary code remotely on affected systems. The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).
Potential Impact
Successful exploitation of this vulnerability allows remote attackers to execute arbitrary code on the affected vBulletin server, potentially leading to full system compromise. It has been observed in active exploitation campaigns in the wild, indicating a tangible threat to unpatched systems.
Mitigation Recommendations
No explicit patch or remediation details are provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to vulnerable endpoints and monitor for exploitation attempts.
Threat ID: 6adc6f613fe894698b2dda6b
Added to database: 10/24/2026, 08:42:09 UTC
Last enriched: 10/24/2026, 08:43:06 UTC
Last updated: 10/24/2026, 09:30:24 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.