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Maxthon3 versions prior to 3.3 are vulnerable to cross context scripting (XCS) via the about:history page. The browser’s trusted zone improperly handles injected script content, allowing attackers to execute arbitrary JavaScript in a privileged context. This flaw enables modification of browser configuration and execution of arbitrary code through Maxthon’s exposed DOM APIs, including maxthon.program.Program.launch() and maxthon.io.writeDataURL(). Exploitation requires user interaction, typically by visiting a malicious webpage that triggers the injection.
Reserved 2025-08-05 | Published 2025-08-05 | Updated 2025-08-05 | Assigner VulnCheckCWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
CWE-94 Improper Control of Generation of Code ('Code Injection')
Roberto Suggi Liverani
raw.githubusercontent.com/.../browser/maxthon_history_xcs.rb
www.exploit-db.com/exploits/23225
blog.malerisch.net/...t-scripting-xcs-about-history-rce.html
www.maxthon.com/
www.fortiguard.com/encyclopedia/ips/34203
www.vulncheck.com/...ies/maxthon3-xcs-trusted-zone-code-exec
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