What’s Vulnerable › Vulnerabilities
CVE-2025-53631: flaskBlog XSS Vulnerability in postContent
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-08-14 · updated 2026-06-17
- Weakness: CWE-79
Description
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 including /, /post/[ID], /admin/posts, and /user/[ID] of the user that made the post. At time of publication, there are no public patches available.
Affected products
- DogukanUrker FlaskBlog: through 2.8.1
References
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