CVE-2025-55735 Information

Description

flaskBlog is a blog app built with Flask. In 2.8.0 and earlier when creating a post there’s no validation of the content of the post stored in the variable \postContent. The vulnerability arises when displaying the content of the post using the | safe filter that tells the engine to not escape the rendered content. This can lead to a stored XSS inside the content of the post. The code that causes the problem is in template/routes.html.

Reference

https://github.com/DogukanUrker/FlaskBlog/security/advisories/GHSA-gj9v-qhc3-gcfx

Related CNNVD

CNNVD-202508-2205 (Published: 2025-08-19)