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CVE-2026-25527— changedetection.io vulnerable to unauthenticated static path traversal

Quick assessment

Affected
dgtlmoon changedetection.io
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

changedetection.io是dgtlmoon个人开发者的一个网站变更检测、监控和通知应用程序。 changedetection.io 0.53.2之前版本存在路径遍历漏洞，该漏洞源于/static/<group>/<filename>路由接受group=..参数，可能导致未经身份验证的本地文件读取。

CVSS 5.3 · Medium EPSS 0.91% · P59

Public Exploits 1

Nuclei · 1 CVE-2026-25527.yaml [template]

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2026-25527

Vulnerability Information
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Vulnerability Title
changedetection.io vulnerable to unauthenticated static path traversal
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
changedetection.io 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
changedetection.io是dgtlmoon个人开发者的一个网站变更检测、监控和通知应用程序。 changedetection.io 0.53.2之前版本存在路径遍历漏洞，该漏洞源于/static/<group>/<filename>路由接受group=..参数，可能导致未经身份验证的本地文件读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
dgtlmoon changedetection.io < 0.53.2 -

II. Public POCs for CVE-2026-25527

# POC Description Source Link Shenlong Link
1 changedetection.io <= 0.53.9 contains a path traversal caused by improper validation of the 'group' parameter in /static/<group>/<filename> route, letting unauthenticated attackers read local application source files. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-25527.yaml POC Details
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III. Intelligence Information for CVE-2026-25527

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Vendor Advisories for CVE-2026-25527 (1)

IV. Related Vulnerabilities

Same product: changedetection.io
Same vendor: dgtlmoon
Same weakness: CWE-22

V. Comments for CVE-2026-25527

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