CVE-2026-27645: changedetection.io Vulnerable to Reflected XSS in RSS Single Watch Error Response
dgtlmoon · changedetection.io
Affected: dgtlmoon changedetection.io · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 43% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- dgtlmoon · changedetection.io< 0.54.1
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- Changedetection.io RSS Single Watch - Cross-Site Scripting · nuclei template in projectdiscovery/nuclei-templates
- Weakness
- Cross-site Scripting
- Vendor
- dgtlmoon
- Published
- February 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-27645 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.