CVE-2026-29038CWE-79

changedetection.io: Reflected XSS in RSS Tag Error Response

Medium · published March 6, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
28.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00359 · 28.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-03-06T06:53Z
EPSS history
Timeline
  • 06 MAR 06:53Z
    changedetection.io: Reflected XSS in RSS Tag Error Response
    cvelistv5