ApostropheCMS: Stored XSS via Unescaped Widget Style Attribute Serialization

影響: npm:apostrophe < 4.34.0 → 4.34.0 Summary ApostropheCMS widget styles support project-defined schema fields. If a project defines a free-form string style field with a CSS property and no selector, an editor-controlled value is rendered as an inline CSS declaration. The resulting declaration is then inserted into the widget wrapper's style="..." attribute without HTML-attribute escaping. An attacker who can edit the widget can include a double quote in the style value, terminate the style attribute, and inject new HTML event-ha…

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