medium5.3
CVE-2026-25527
changedetection.io is vulnerable to unauthenticated static path traversal
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | changedetection.io | < 0.53.2 | 0.53.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Webtechnologies | Changedetection | before 0.53.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-9jj8-v89v-xjvw
- https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-9jj8-v89v-xjvw
- https://nvd.nist.gov/vuln/detail/CVE-2026-25527
- https://github.com/dgtlmoon/changedetection.io/commit/9d38b4517364831889b5b0d7b3465fd060403fd4
- https://github.com/pypa/advisory-database/tree/main/vulns/changedetection-io/PYSEC-2026-2124.yaml