Exploitation Summary
CVE-2026-25527 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.
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.
Nuclei Templates (1)
changedetection.io <= 0.52.9 - Unauthenticated Path Traversal
MEDIUMVERIFIEDby WRG-11
Shodan:
http.html:"changedetection.io"
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-9jj8-v89v-xjvw
Scores
CVSS v3
5.3
EPSS
0.0074
EPSS Percentile
49.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-22
Status
published
Products (1)
webtechnologies/changedetection
< 0.53.2
Published
Feb 19, 2026
Tracked Since
Feb 19, 2026