Vulnerability · Published Aug 14, 2025 · Assigned by GitHub_M
CVE-2025-53631flaskBlog XSS Vulnerability in postContent
Medium 5.3
In plain English
A medium-severity cross-site scripting in flaskBlog from DogukanUrker. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| DogukanUrker | flaskBlog | <= 2.8.1 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N