CVE-2025-55734: flaskblog Auth Bypass — Exploit

Description

flaskBlog is a blog app built with Flask. In 2.8.0 and earlier, the code checks if the userRole is "admin" only when visiting the /admin page, but not when visiting its subroutes. Specifically, only the file routes/adminPanel.py checks the user role when a user is trying to access the admin page, but that control is not done for the pages routes/adminPanelComments.py and routes/adminPanelPosts.py. Thus, an unauthorized user can bypass the intended restrictions, leaking sensitive data and accessing the following pages: /admin/posts, /adminpanel/posts, /admin/comments, and /adminpanel/comments.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-862 Missing Authorization

Affected Products

Vendor	Product	Versions
dogukanurker	flaskblog	< 2.8.0

References

Exploits

https://github.com/DogukanUrker/FlaskBlog/security/advisories/GHSA-h239-vv39-v3vx https://github.com/DogukanUrker/FlaskBlog/security/advisories/GHSA-jw79-2xvp-76p8

Frequently Asked Questions

What is CVE-2025-55734? +

flaskBlog is a blog app built with Flask. In 2.8.0 and earlier, the code checks if the userRole is "admin" only when visiting the /admin page, but not when visiting its subroutes. Specifically, only the file routes/adminPanel.py checks the user role when a user is trying to access the admin page, but that control is not done for the pages routes/adminPanelComments.py and routes/adminPanelPosts.py. Thus, an unauthorized user can bypass the intended restrictions, leaking sensitive data and accessing the following pages: /admin/posts, /adminpanel/posts, /admin/comments, and /adminpanel/comments. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-55734? +

CVE-2025-55734 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-55734? +

CVE-2025-55734 affects products from dogukanurker, specifically: flaskblog. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-55734? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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