CVE-2025-53631 – FlaskBlog Flask XSS Vulnerability

CVE ID : CVE-2025-53631

Published : Aug. 14, 2025, 4:15 p.m. | 21 minutes ago

Description : 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.

Severity: 0.0 | NA

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