changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, the RSS single-watch endpoint reflects the UUID path parameter directly in the HTTP response body without HTML escaping. Since Flask returns text/html by default for plain string responses, the browser parses and executes injected JavaScript. Version 0.54.1 contains a fix for the issue.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-mw8m-398g-h89w changedetection.io Vulnerable to Reflected XSS in RSS Single Watch Error Response
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 27 Feb 2026 05:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 25 Feb 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Webtechnologies
Webtechnologies changedetection
CPEs cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*
Vendors & Products Webtechnologies
Webtechnologies changedetection

Wed, 25 Feb 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Dgtlmoon
Dgtlmoon changedetection.io
Vendors & Products Dgtlmoon
Dgtlmoon changedetection.io

Wed, 25 Feb 2026 05:00:00 +0000

Type Values Removed Values Added
Description changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, the RSS single-watch endpoint reflects the UUID path parameter directly in the HTTP response body without HTML escaping. Since Flask returns text/html by default for plain string responses, the browser parses and executes injected JavaScript. Version 0.54.1 contains a fix for the issue.
Title changedetection.io Vulnerable to Reflected XSS in RSS Single Watch Error Response
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-25T14:55:58.413Z

Reserved: 2026-02-20T22:02:30.029Z

Link: CVE-2026-27645

cve-icon Vulnrichment

Updated: 2026-02-25T14:53:48.952Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-25T05:17:26.317

Modified: 2026-02-25T16:51:33.417

Link: CVE-2026-27645

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-25T11:34:37Z

Weaknesses