CVE-2026-25527
February 19, 2026
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.
Affected Packages
https://github.com/dgtlmoon/changedetection.io.git (GITHUB):
Affected version(s) >=0.1 <0.53.2Fix Suggestion:
Update to version 0.53.2Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
EPSS
Base Score:
0.06
