CVE-2026-25527

changedetection.io vulnerable to unauthenticated static path traversal

Published Feb 19, 2026 CVSS 3.1 · 5.3 Medium EPSS 1.0% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-9jj8-v89v-xjvw changedetection.io is vulnerable to unauthenticated static path traversal
History
Type Values Removed Values Added
First Time appeared Dgtlmoon
Dgtlmoon changedetection.io
Vendors & Products Dgtlmoon
Dgtlmoon changedetection.io
Type Values Removed Values Added
First Time appeared Webtechnologies
Webtechnologies changedetection
CPEs cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*
Vendors & Products Webtechnologies
Webtechnologies changedetection
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title changedetection.io vulnerable to unauthenticated static path traversal
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Feb 19, 2026, 3:35 PM
Reserved
Feb 2, 2026, 7:59 PM
Status
Analyzed
Published
Feb 19, 2026, 3:16 PM
Modified
Jun 17, 2026, 10:24 AM