CVE-2025-55735
Medium
Description
flaskBlog is a blog app built with Flask. In 2.8.0 and earlier, when creating a post, there's no validation of the content of the post stored in the variable "postContent". The vulnerability arises when displaying the content of the post using the | safe filter, that tells the engine to not escape the rendered content. This can lead to a stored XSS inside the content of the post. The code that causes the problem is in template/routes.html.
SeverityMedium
CVSS5.4
Exploit probability—
ProductDogukanurker Flaskblog
PublishedAug 19, 2025
First seenAug 19, 2025
Weakness typeCWE-79Cross-site scripting (XSS)CWE-807CWE-807
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dogukanurker flaskblog | v ≤ 2.8.0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.