CVE-2026-29038

MEDIUM
2026-03-06 [email protected] GHSA-8whx-v8qq-pq64
6.1
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
PoC Detected
Mar 10, 2026 - 19:38 vuln.today
Public exploit code
Patch Released
Mar 10, 2026 - 19:38 nvd
Patch available
CVE Published
Mar 06, 2026 - 07:16 nvd
MEDIUM 6.1

Tags

Flask XSS Changedetection

Description

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.

Analysis

Reflected XSS in changedetection.io versions prior to 0.54.4 allows unauthenticated remote attackers to inject malicious JavaScript through the /rss/tag/ endpoint via an unescaped tag_uuid parameter, enabling session hijacking or credential theft when victims visit crafted links. The vulnerability requires user interaction to trigger and affects the Flask-based application with public exploit code available. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

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Priority Score

51
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +30
POC: +20

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CVE-2026-29038 vulnerability details – vuln.today
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