{"cve":"CVE-2026-27645","nvd":{"published":"2026-02-25T05:17:26.317","modified":"2026-06-17T10:27:27.023","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://github.com/dgtlmoon/changedetection.io/commit/a385c89abf44b52fcfa20c7c6a6dd3047c4c1eb5","https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89w","https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89w"],"products":["webtechnologies:changedetection"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-27645","score":0.00495,"percentile":0.42523,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-mw8m-398g-h89w","url":"https://osv.dev/vulnerability/GHSA-mw8m-398g-h89w","summary":"changedetection.io Vulnerable to Reflected XSS in RSS Single Watch Error Response","modified":"2026-07-13T07:26:27.294322543Z","packages":[{"ecosystem":"PyPI","name":"changedetection-io","purl":"pkg:pypi/changedetection-io","ranges":["<0.53.7"],"fixed":["0.53.7"]}]},{"id":"PYSEC-2026-2125","url":"https://osv.dev/vulnerability/PYSEC-2026-2125","summary":"","modified":"2026-07-13T07:15:17.071337736Z","packages":[{"ecosystem":"PyPI","name":"changedetection-io","purl":"pkg:pypi/changedetection-io","ranges":["<0.54.1"],"fixed":["0.54.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}