Moderate severityNVD Advisory· Published Feb 25, 2026· Updated Feb 25, 2026
changedetection.io Vulnerable to Reflected XSS in RSS Single Watch Error Response
CVE-2026-27645
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
changedetection.ioPyPI | < 0.53.7 | 0.53.7 |
Affected products
2- Range: < 0.54.1
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-mw8m-398g-h89wghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-27645ghsaADVISORY
- github.com/dgtlmoon/changedetection.io/commit/a385c89abf44b52fcfa20c7c6a6dd3047c4c1eb5ghsax_refsource_MISCWEB
- github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89wghsax_refsource_CONFIRMWEB
News mentions
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