CVE-2025-62780 PoC — changedetection.io vulnerable to stored XSS in Watch update via API

Title:changedetection.io vulnerable to stored XSS in Watch update via API (CVE-2025-62780)
Description:changedetection.io is a free open source web page change detection tool. A Stored Cross Site Scripting is present in changedetection.io Watch update API in versions prior to 0.50.34 due to insufficient security checks. Two scenarios are possible. In the first, an attacker can insert a new watch with an arbitrary URL which really points to a web page. Once the HTML content is retrieved, the attacker updates the URL with a JavaScript payload. In the second, an attacker substitutes the URL in an existing watch with a new URL that is in reality a JavaScript payload. When the user clicks on *Preview* and then on the malicious link, the JavaScript malicious code is executed. Version 0.50.34 fixes the issue.

changedetection.io <= 0.50.34 contains a stored cross site scripting caused by insufficient security checks in the Watch update API, letting attackers execute arbitrary JavaScript when users preview malicious links, exploit requires user interaction

 id: CVE-2025-62780

info:
  name: ChangeDetection.io <= v0.50.33 - Stored XSS via Watch API
  author

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