CVE-2026-25527 json
changedetection.io vulnerable to unauthenticated static path traversal
published 2026-02-19 8 mo ago modified 2026-07-20 3 mo ago also GHSA-9jj8-v89v-xjvw , PYSEC-2026-2124 , EUVD-2026-7968
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 63%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
- pypi changedetection-io 0.53.2
- webtechnologies changedetection 0.53.2
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template changedetection.io <= 0.52.9 - Unauthenticated Path Traversal nuclei detection template
- github.com https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-9jj8-v89v-xjvw referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | changedetection-io | <0.53.2 |
0.53.2 |
Affected products
- dgtlmoon changedetection.io
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/dgtlmoon/changedetection.io/commit/9d38b4517364831889b5b0d7b3465fd060403fd4
web, patch
-
github.com
/dgtlmoon/changedetection.io/security/advisories/GHSA-9jj8-v89v-xjvw
web, exploit, vendor-advisory, evidence
-
nvd.nist.gov
/vuln/detail/CVE-2026-25527
advisory
-
github.com
/dgtlmoon/changedetection.io
package
-
github.com
/pypa/advisory-database/tree/main/vulns/changedetection-io/PYSEC-2026-2124.yaml
web
Sources
- CVE List CVE-2026-25527
- GitHub Advisory GHSA-9jj8-v89v-xjvw
- NVD CVE-2026-25527
- OSV PYSEC-2026-2124
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.