Vulnerability in Popular Conference Software Granted Attackers a 100% Talk Acceptance Rate

Researchers at Novee Security have disclosed a high-severity vulnerability in Pretalx, an open source platform that powers the call-for-papers (CFP) and scheduling processes for many technical conferences worldwide.  The flaw, tracked as CVE-2026-41241 and described as a stored XSS issue, allowed any registered conference speaker to plant malicious code that would silently execute the moment an organizer searched for the attacker’s submission.  The vulnerability has been patched in Pretalx version 2026.1.0. Because dozens of high-profile technical conferences share the same underlying Pretalx codebase, a single attack technique could be deployed across every deployment simultaneously.  A malicious actor could submit a booby-trapped talk proposal to multiple conferences, wait for organizers to search their submission, and then have those organizers’ accounts automatically compromised without any further interaction. The platform’s security mechanisms are designed to block unauthorized scripts from running, and the browser’s own systems should have suppressed injected code.  However, Novee researchers found a way to circumvent both defenses by combining harmless platform features — specifically, the ability to upload speaker materials and the way search results are displayed — into a chain that enabled full JavaScript execution in an organizer’s browser.  The impact could extend to a 100% talk acceptance rate. An attacker armed with this vulnerability and an AI agent could, in theory, automate submissions to every Pretalx-powered event, embed the malicious payload in submission titles loaded with common search terms, and wait for organizers’ queries to trigger the exploit, effectively forcing their talks to be accepted without any genuine review.  Novee researchers demonstrated this scenario as a proof of concept to illustrate the real-world abuse potential. Related: CISA Urges Immediate Patching of Exploited LiteSpeed cPanel Plugin Zero-Day Related: Hackers Exploited KnowledgeDeliver Zero-Day for Web Shell Deployment Related: Ghost CMS Vulnerability Exploited to Hack Over 700 Websites WRITTEN BY Eduard Kovacs Eduard Kovacs (@EduardKovacs) is senior managing editor at SecurityWeek. He worked as a high school IT teacher before starting a career in journalism in 2011. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering. 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