CVE-2026-29038

MEDIUM 6.1

changedetection.io: Reflected XSS in RSS Tag Error Response

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	dgtlmoon
Product	changedetection.io
Published	Mar 6, 2026
Last Updated	Mar 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

dgtlmoon / changedetection.io

< 0.54.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-8whx-v8qq-pq64 github.com: https://github.com/dgtlmoon/changedetection.io/commit/ec7d56f85d1e9690fca7cb4711c1fb20dffec780 github.com: https://github.com/dgtlmoon/changedetection.io/releases/tag/0.54.4