CVE-2026-25527 — MEDIUM (5.3)

Vulnerability 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.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Webtechnologies	Changedetection	< 0.53.2

Related Weaknesses (CWE)

CWE-22

References

FAQ

What is CVE-2026-25527?

CVE-2026-25527 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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("st...

How severe is CVE-2026-25527?

CVE-2026-25527 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-25527?

Check the references section above for vendor advisories and patch information. Affected products include: Webtechnologies Changedetection.