CVE-2026-25527: changedetection.io is vulnerable to unauthenticated static path traversal
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). Severity is low information disclosure (C:L).
References
- github.com/advisories/GHSA-9jj8-v89v-xjvw
- github.com/dgtlmoon/changedetection.io/commit/9d38b4517364831889b5b0d7b3465fd060403fd4
- github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-9jj8-v89v-xjvw
- github.com/pypa/advisory-database/tree/main/vulns/changedetection-io/PYSEC-2026-2124.yaml
- nvd.nist.gov/vuln/detail/CVE-2026-25527
Code Behaviors & Features
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