CVE-2026-25527
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
4Tags
Description
changedetection.io is a free open source web page change detection tool. In versions prior to 0.53.2, the `/static/<group>/<filename>` route accepts `group=".."`, which causes `send_from_directory("static/..", filename)` to execute. This moves the base directory up to `/app/changedetectionio`, enabling unauthenticated local file read of application source files (e.g., `flask_app.py`). Version 0.53.2 fixes the issue.
Analysis
Changedetection.io versions before 0.53.2 allow unauthenticated attackers to read arbitrary files from the application directory through directory traversal in the static file serving endpoint. An attacker can exploit this by manipulating the group parameter to escape the intended static directory and access sensitive application files like source code. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 30 days: Identify affected systems running versions and apply vendor patches as part of regular patch cycle. Review file handling controls.
Sign in for detailed remediation steps.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today