ChangeDetection.io XSS in watch overview

### Impact XSS - Errors in filters from website page change detection watches were not being filtered. ### Patches 0.50.4

changedetection.io Vulnerable to Improper Input Validation Leading to LFR/Path Traversal

### Summary Improper input validation in the application can allow attackers to perform local file read (LFR) or path traversal attacks. These vulnerabilities occur when user input is used to construct file paths without adequate sanitization or validation. For example, using `file:../../../etc/passwd` or `file: ///etc/passwd` can bypass weak validations and allow unauthorized access to sensitive files. Even though this has been addressed in previous patch, it is still insufficient. ### Details

changedetection.io path traversal using file URI scheme without supplying hostname

### Summary The validation for the file URI scheme falls short, and results in an attacker being able to read any file on the system. This issue only affects instances with a webdriver enabled, and `ALLOW_FILE_URI` false or not defined. ### Details The check used for URL protocol, `is_safe_url`, allows `file:` as a URL scheme: https://github.com/dgtlmoon/changedetection.io/blob/e0abf0b50507a8a3d0c1d8522ab23519b3e4cdf4/changedetectionio/model/Watch.py#L11-L13 It later checks if local files a

changedetection.io Path Traversal

### Summary When a WebDriver is used to fetch files source:file:///etc/passwd can be used to retrieve local system files, where the more traditional file:///etc/passwd gets blocked ### Details The root cause is the payload source:file:///etc/passwdpasses the regex [here](https://github.com/dgtlmoon/changedetection.io/blob/master/changedetectionio/model/Watch.py#L19) and also passes the check [here](https://github.com/dgtlmoon/changedetection.io/blob/master/changedetectionio/processors/__init__.

changedetection.io Cross-site Scripting vulnerability

### Summary Input in parameter notification_urls is not processed resulting in javascript execution in the application ### Details changedetection.io version: v0.45.21 https://github.com/dgtlmoon/changedetection.io/blob/0.45.21/changedetectionio/forms.py#L226 ``` for server_url in field.data: if not apobj.add(server_url): message = field.gettext('\'%s\' is not a valid AppRise URL.' % (server_url)) raise ValidationError(message) ``` ### PoC