Ui5 Webcomponents Base
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CSS stylesheet injection in SAP @ui5/webcomponents-base allows unauthenticated remote attackers to load arbitrary cross-origin stylesheets into victim pages by bypassing the sap-allowed-theme-origins allowlist enforcement inside setThemeRoot(). The ?sap-themeRoot URL query parameter is a direct delivery vector, making socially-engineered exploitation trivial - no authentication is required from the attacker (CVSS PR:N), only a victim page load (UI:R). Successful exploitation enables UI redressing, clickjacking, phishing overlays, visual defacement, and limited CSS attribute-selector-based data exfiltration; no public exploit identified at time of analysis, and the vulnerability is not listed in CISA KEV.
CSS stylesheet injection in SAP @ui5/webcomponents-base allows unauthenticated remote attackers to load arbitrary cross-origin stylesheets into victim pages by bypassing the sap-allowed-theme-origins allowlist enforcement inside setThemeRoot(). The ?sap-themeRoot URL query parameter is a direct delivery vector, making socially-engineered exploitation trivial - no authentication is required from the attacker (CVSS PR:N), only a victim page load (UI:R). Successful exploitation enables UI redressing, clickjacking, phishing overlays, visual defacement, and limited CSS attribute-selector-based data exfiltration; no public exploit identified at time of analysis, and the vulnerability is not listed in CISA KEV.