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CVE-2025-53631— flaskBlog XSS Vulnerability in postContent

Quick assessment

Affected
DogukanUrker flaskBlog
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FlaskBlog是Doğukan Ürker个人开发者的一个使用 Flask 构建的简单博客应用程序。 flaskBlog 2.8.1及之前版本存在跨站脚本漏洞，该漏洞源于postContent清理不当，可能导致任意JavaScript执行。

AI Predicted 6.1 Difficulty: Easy EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2025-53631

Vulnerability Information
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Vulnerability Title
flaskBlog XSS Vulnerability in postContent
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
flaskBlog 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FlaskBlog是Doğukan Ürker个人开发者的一个使用 Flask 构建的简单博客应用程序。 flaskBlog 2.8.1及之前版本存在跨站脚本漏洞，该漏洞源于postContent清理不当，可能导致任意JavaScript执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
DogukanUrker flaskBlog <= 2.8.1 -

II. Public POCs for CVE-2025-53631

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III. Intelligence Information for CVE-2025-53631

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Vendor Advisories for CVE-2025-53631 (1)

IV. Related Vulnerabilities

Same product: flaskBlog
Same vendor: DogukanUrker
Same weakness: CWE-79

V. Comments for CVE-2025-53631

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