importantSYS.SOURCE: The Hacker News• 2026-07-27T20:10:00+05:30

Public Exploit Released for Patched vBulletin Pre-Auth Code Execution Vulnerability CVE-2026-61511

#vulnerability #remote code execution #php security #web application security #software security

A public exploit was released for a previously patched vBulletin pre-authentication remote code execution vulnerability (CVE-2026-61511), affecting versions 6.2.1 and earlier, with patches available since late June 2026. Unpatched self-hosted installations remain at risk despite the vendor's fixes and the exploit targeting a now-patched flaw.

Public exploit details released on July 27 show how an unauthenticated request can reach PHP's eval() function inside vBulletin and execute code on an unpatched forum server. The attack requires no account, administrative access, or interaction from another user.

SSD Secure Disclosure lists vBulletin 6.2.1 and earlier, and 6.1.6 and earlier, as affected, but does not give a lower version

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> ADOBE CAMPAIGN CLASSIC CVSS 10.0 CRITICAL VULNERABILITY ENABLES ARBITRARY CODE EXECUTION WITHOUT USER INTERACTION > HIJACKED HOTEL WI-FI NETWORKS EXPLOIT FAKE UPDATES TO DEPLOY SURVEILLANCE MALWARE > TEN CRITICAL ISSUES IMPACTING NAS SYSTEMS > THE PURPOSE AND VALUE OF LIBERAL ARTS EDUCATION IN MODERN CAREER DEVELOPMENT > DEVELOPMENT PIPELINE AS CRITICAL PRODUCTION SYSTEM IN SOFTWARE ENGINEERING > FLINT: A VISUALIZATION LANGUAGE FOR THE AI ERA > CHALLENGES IN MODERATING A MATRIX COMMUNITY: A WEEK-LONG EXPERIENCE > THE CHALLENGE OF EXISTENCE: A MINDFULNESS PRACTICE FOR PRESENT-MOMENT AWARENESS > OPENAI INVESTIGATES MULTIPLE AI AGENT ESCAPES FROM TEST ENVIRONMENTS > RIVIAN SPINOFF ALSO BEGINS E-BIKE DELIVERIES AMID SUPPLY CHAIN CHALLENGES> ADOBE CAMPAIGN CLASSIC CVSS 10.0 CRITICAL VULNERABILITY ENABLES ARBITRARY CODE EXECUTION WITHOUT USER INTERACTION > HIJACKED HOTEL WI-FI NETWORKS EXPLOIT FAKE UPDATES TO DEPLOY SURVEILLANCE MALWARE > TEN CRITICAL ISSUES IMPACTING NAS SYSTEMS > THE PURPOSE AND VALUE OF LIBERAL ARTS EDUCATION IN MODERN CAREER DEVELOPMENT > DEVELOPMENT PIPELINE AS CRITICAL PRODUCTION SYSTEM IN SOFTWARE ENGINEERING > FLINT: A VISUALIZATION LANGUAGE FOR THE AI ERA > CHALLENGES IN MODERATING A MATRIX COMMUNITY: A WEEK-LONG EXPERIENCE > THE CHALLENGE OF EXISTENCE: A MINDFULNESS PRACTICE FOR PRESENT-MOMENT AWARENESS > OPENAI INVESTIGATES MULTIPLE AI AGENT ESCAPES FROM TEST ENVIRONMENTS > RIVIAN SPINOFF ALSO BEGINS E-BIKE DELIVERIES AMID SUPPLY CHAIN CHALLENGES