What is CVE-2025-53631?

CVE-2025-53631 is a medium-severity vulnerability in Dogukanurker Flaskblog, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-08-14.

How severe is CVE-2025-53631?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Dogukanurker Flaskblog

CVE-2025-53631

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 in…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (9.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Dogukanurker Flaskblog — versions <= 2.8.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2025-53631?: CVE-2025-53631 is a medium-severity vulnerability in Dogukanurker Flaskblog, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-08-14.
How severe is CVE-2025-53631?: Medium severity. CVSS v3 base score is 5.4 out of 10.