Vulnerability Details CVE-2026-29038
changedetection.io is a free open source web page change detection tool. Prior to version 0.54.4, there is a reflected cross-site scripting (XSS) vulnerability identified in the /rss/tag/ endpoint of changedetection.io. The tag_uuid path parameter is reflected 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. This issue has been patched in version 0.54.4.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 7.8%
CVSS Severity
CVSS v3 Score 6.1