GHSA-pwgc-w4x9-gw67 is a medium-severity (CVSS 4.3) Cross-site Scripting (XSS) vulnerability in changedetection-io. O3 Security confirms whether GHSA-pwgc-w4x9-gw67 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
changedetection.io Cross-site Scripting vulnerability
Real-World Exposure
changedetection-ioReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
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
Setting > ADD Notification URL List
"><img src=x onerror=alert(document.domain)>
Requests
Impact
A reflected XSS vulnerability happens when the user input from a URL or POST data is reflected on the page without being stored, thus allowing the attacker to inject malicious content
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | changedetection-io | all versions | 0.45.22 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for changedetection-io. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update changedetection-io to 0.45.22 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-pwgc-w4x9-gw67 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-pwgc-w4x9-gw67 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-pwgc-w4x9-gw67. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-pwgc-w4x9-gw67 in your dependencies?
O3 detects GHSA-pwgc-w4x9-gw67 across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.