PT-2025-33853 · Flaskblog · Flaskblog

Davidedc97 · Published 2025-08-19 · Updated 2025-08-22 · CVE-2025-55735

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: flaskBlog versions prior to 2.8.0

Description: flaskBlog is a blog application built with Flask. A stored cross-site scripting (XSS) issue exists due to a lack of validation for the content of a post stored in the postContent variable. The application displays the post content using the | safe filter, which disables output escaping, leading to potential XSS exploitation. The vulnerable code resides in the template/routes.html file.

Recommendations: Update flaskBlog to version 2.8.0 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-807

CWE-79

Related Identifiers

CVE-2025-55735

GHSA-GJ9V-QHC3-GCFX

Affected Products

Flaskblog

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55735.json · Exploit
• 🔥 https://github.com/DogukanUrker/FlaskBlog/security/advisories/GHSA-gj9v-qhc3-gcfx · Exploit
• https://osv.dev/vulnerability/CVE-2025-55735 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-55735 · Security Note
• https://twitter.com/CVEnew/status/1957883547907150128 · Twitter Post
• https://t.me/CVEtracker/30390 · Telegram Post
• https://t.me/cveNotify/133228 · Telegram Post