CVE-2025-53631

MEDIUM

flaskBlog < 2.8.1 - Stored Cross-Site Scripting via Post Content

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.4
EPSS 0.0020
EPSS Percentile 9.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
dogukanurker/flaskblog < 2.8.1
Published Aug 14, 2025
Tracked Since Feb 18, 2026