CVE-2026-29038
changedetection.io: Reflected XSS in RSS Tag Error Response
MEDIUM 6.1EPSS 0.4%
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.
- Affected
- dgtlmoon · changedetection.io
- CVSS v3.1 GITHUB
- 6.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS
- 0.35% chance of exploitation in the next 30 days, 27th percentile
- Published
- 2026-03-06
- Updated
- 2026-03-09
Proof-of-concept exploits (1)
Security advisories
- dgtlmoon/changedetection.io/security/advisories/GHSA-8whx-v8qq-pq64
- dgtlmoon/changedetection.io/commit/ec7d56f85d1e9690fca7cb4711c1fb20dffec780