Medium
changedetection.io vulnerable to unauthenticated static path traversal
Type: advisorySources: OSV
changedetection.io is a free open source web page change detection tool. In versions prior to 0.53.2, the `/static//` 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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-25527
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 03:57 UTC · Revision 1
Source evidence
changedetection.io vulnerable to unauthenticated static path traversal
core-osv · Original sourcePublished 19 Feb 2026, 14:18 UTC
changedetection.io is a free open source web page change detection tool. In versions prior to 0.53.2, the `/static//` 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.
osv:CVE-2026-25527
Complete source record
{
"id": "73cea680695490099af2e52edce45e8f15b580c4f3b023858b7de7999b423ab0",
"url": "https://osv.dev/vulnerability/CVE-2026-25527",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "changedetection.io vulnerable to unauthenticated static path traversal",
"summary": "changedetection.io is a free open source web page change detection tool. In versions prior to 0.53.2, the `/static//` 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.",
"evidence": "osv:CVE-2026-25527",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-25527",
"aliases": [
"CVE-2026-25527",
"GHSA-9jj8-v89v-xjvw",
"PYSEC-2026-2124"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/dgtlmoon/changedetection.io",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "86e5184cef9ccd2d04f53fe2f0ec52739b7357fe"
},
{
"fixed": "9d38b4517364831889b5b0d7b3465fd060403fd4"
}
],
"database_specific": {
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{
"cpe": "cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
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{
"fixed": "0.53.2"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "9d38b4517364831889b5b0d7b3465fd060403fd4"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25527.json"
}
}
],
"modified": "2026-10-28T02:30:26.017676202Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25527.json",
"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"
],
"provider_metadata": {
"cwe_ids": [
"CWE-22"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25527.json"
}
},
"related_cves": [
{
"value": "CVE-2026-25527",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492310,
"published_at": "2026-02-19T14:18:18.933+00:00"
}