Auth bypass in Dogukanurker Flaskblog
CVE-2025-55737
flaskBlog is a blog app built with Flask. In 2.8.0 and earlier, when deleting a comment, there's no validation of the ownership of the comment. Every user can delete an arbitrary comment of another user on every post, by simply intercepting the delete request and changing the commentID. The code that causes the problem is in routes/post.py.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (19.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Dogukanurker Flaskblog — versions <= 2.8.0
Weakness classification (CWE)
References
- github.com/DogukanUrker/FlaskBlog/security/advisories/GHSA-6hp9-jv2f-88wr (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-55737?
- CVE-2025-55737 is a medium-severity vulnerability in Dogukanurker Flaskblog, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2025-08-19.
- How severe is CVE-2025-55737?
- Medium severity. CVSS v3 base score is 6.5 out of 10.