CVE Daily

CVE-2025-53631

flaskBlog is a blog app built with Flask. In versions 2.8.1 and prior, improper ...

Medium CVSS 5.3

Overview

flaskBlog is a blog app built with Flask. In versions 2.8.1 and prior, improper sanitization of postContent when submitting POST requests to /createpost leads to arbitrary JavaScript execution (XSS) on all pages the post is reflected on including /, /post/[ID], /admin/posts, and /user/[ID] of the user that made the post. At time of publication, there are no public patches available.

CWE: CWE-79 Published: 2025-08-14T16:15:36.840
Risk analysis

This vulnerability is rated 🟡 MEDIUM.

  • CVSS: 5.3 (MEDIUM)
  • Detected tags: xss (tag impact: MODERATE)

Recommended actions:

  • Apply context-aware output encoding.
  • Enable Content-Security-Policy and HttpOnly/SameSite cookies.

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