CVE-2025-62780: changedetection Cross-site Scripting

Vulnerability summary

CVE-2025-62780 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in changedetection. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 39% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 10-11-2025
   PublishedVulnerability first disclosed.
2. 10-11-2025
   Last modifiedVulnerability information updated.

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.

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.