XSS via unsafe postMessage() origin handling in Stockdio Historical Chart WordPress plugin (< 2.8.1)
The Stockdio Historical Chart WordPress plugin prior to 2.8.1 contains a cross-site scripting issue in stockdio_chart_historical-wp.js (wp-content/plugins/stockdio-historical-chart/assets/) due to unsafe handling of window.postMessage() events. The stockdio_eventer message handler does not validate the event.origin and only checks that e.data and e.data.method are not undefined before evaluating attacker-controlled content via eval(e.data.method). An attacker-controlled website can open a window to a vulnerable WordPress instance and send a crafted postMessage (e.g., postMessage(msg,'*')) to trigger execution of arbitrary JavaScript in the context of the vulnerable site.
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Recent activity
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A cross-site scripting (XSS) vulnerability in the Stockdio Historical Chart WordPress plugin that could allow a remote attacker to execute arbitrary JavaScript in a victim’s browser context.
An exploitable XSS issue in the Stockdio Historical Chart plugin (prior to 2.8.1) where untrusted postMessage data is passed to eval() without adequate validation/origin checks, enabling remote JavaScript execution in the browser context where the plugin runs.
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