CVE-2025-53631 MEDIUM

CVE-2025-53631: flaskBlog XSS Vulnerability in postContent

Vendor Dogukanurker
Product flaskBlog
Weakness CWE-79 · XSS
Published August 14, 2025
Last update August 14, 2025
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 14, 2025 CVE published
August 14, 2025 Record updated