CISA Warns of XSS Flaw in Johnson Controls Metasys
CISA published an advisory for Johnson Controls Metasys versions 12-15, citing CVE-2026-34491, a stored XSS vulnerability. A low-privilege user can inject a persistent payload via a crafted URL, executing in other users' sessions, including admins, leading to session hijacking. Patches are available for 15.0.1 and 14.1.5.
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