CVE-2026-27645: medium-severity vulnerability in dgtlmoon changedetection.io
changedetection.io Vulnerable to Reflected XSS in RSS Single Watch Error Response
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 6.1epss 0.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
dgtlmoon · changedetection.ioRelated CVEs — dgtlmoon changedetection.io
In the same product, most dangerous first.
CVE-2024-32651CRITICALServer Side Template Injection in Jinja2 allows Remote Command ExecutionEPSS 85.3%CVE-2024-51483MEDIUMchangedetection.io Path Traversal vulnerabilityEPSS 2.3%CVE-2024-34061MEDIUMReflected cross site scripting in changedetection.ioEPSS 1.3%CVE-2026-25527MEDIUMchangedetection.io vulnerable to unauthenticated static path traversalEPSS 1.0%CVE-2024-56509HIGHchangedetection.io has Improper Input Validation Leading to LFR/Path TraversalEPSS 0.7%CVE-2024-51998HIGHPath traversal using file URI scheme without supplying hostname in changedetection.ioEPSS 0.7%