CVE-2025-62780

Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-11-10

Last updated on: 2025-12-31

Assigner: GitHub, Inc.

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-11-10

Last Modified

2025-12-31

Generated

2026-07-06

AI Q&A

2025-11-11

EPSS Evaluated

2026-07-05

NVD

CVE-2025-62780

EUVD

EUVD-2025-50820

Affected Vendors & Products

Vendor	Product	Version / Range
changedetection	changedetection	to 0.50.34 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	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.

Attack-Flow Graph

Executive Summary

This vulnerability is a Stored Cross Site Scripting (XSS) issue in changedetection.io versions prior to 0.50.34. It occurs in the Watch update API due to insufficient security checks. An attacker can insert or modify a watch URL to include a JavaScript payload. When a user previews and clicks the malicious link, the JavaScript code executes, potentially compromising the user's session or data. The issue is fixed in version 0.50.34.

Impact Analysis

The vulnerability can lead to execution of malicious JavaScript code in the context of the user's browser when interacting with the changedetection.io application. This can result in unauthorized actions such as theft of user data, session hijacking, or other malicious activities that compromise the integrity and confidentiality of the user's information.

Mitigation Strategies

Upgrade changedetection.io to version 0.50.34 or later, as this version fixes the Stored Cross Site Scripting vulnerability in the Watch update API. Avoid clicking on suspicious Preview links or URLs in watches until the update is applied.

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