CVE-2026-54064 is a stored cross-site scripting vulnerability in NukeViet affecting the News module. The issue stems from multiple anti-XSS filter bypasses involving weaknesses in the Request::filterAttr() and Request::unhtmlentities() routines. These weaknesses allow crafted input to evade attribute and javascript: scheme filtering, including through handling flaws involving ASCII control characters and HTML entity decoding. An authenticated low-privileged user with permission to post news content can inject malicious script into stored content, which is then rendered and executed in the browsers of users who view the affected pages, including administrative users.
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