How to fix CVE-2025-28102?

Within 30 days: Identify affected systems running flaskBlog and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Is Flaskblog affected by CVE-2025-28102?

Organizations using flaskBlog should be aware of moderate risk from CVE-2025-28102, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available.

CVE-2025-28102

MEDIUM

2025-04-21 [email protected]

6.1

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:38 vuln.today

PoC Detected

Jun 23, 2025 - 13:09 vuln.today

Public exploit code

CVE Published

Apr 21, 2025 - 17:15 nvd

MEDIUM 6.1

Description

A cross-site scripting (XSS) vulnerability in flaskBlog v2.6.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the postContent parameter at /createpost.

Analysis

A cross-site scripting (XSS) vulnerability in flaskBlog v2.6.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the postContent parameter at /createpost. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical Context

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. A cross-site scripting (XSS) vulnerability in flaskBlog v2.6.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the postContent parameter at /createpost. Affected products include: Dogukanurker Flaskblog.

Affected Products

Dogukanurker Flaskblog.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.2

CVSS: +30

POC: +20

CVE-2025-28102 vulnerability details – vuln.today

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CVE-2025-28102

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CVE-2025-28102

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Technical Context

Affected Products

Remediation

Priority Score

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External POC / Exploit Code