What is the CVSS score of CVE-2024-4023?

CVE-2024-4023 has a CVSS 3.0 base score of 8.1 (High). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H. EPSS exploitation probability: 0.2%.

Which versions of Flatpress are affected by CVE-2024-4023?

Organizations using flatpressblog/flatpress face notable risk from CVE-2024-4023, a cross-site scripting vulnerability rated CVSS 8.1.. A patch is available.

Is there a public PoC exploit available for CVE-2024-4023?

Yes, a public proof-of-concept exploit is available for CVE-2024-4023. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2024-4023?

Within 7 days: Identify all affected systems running flatpressblog/flatpress and apply vendor patches promptly. Verify anti-CSRF tokens and content security policies are enforced.

Flatpress CVE-2024-4023

HIGH

Cross-site Scripting (XSS) (CWE-79)

2025-03-20 security@huntr.dev

XSS Flatpress

8.1

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

8.1 HIGH

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:32 vuln.today

Patch released

Mar 28, 2026 - 18:32 nvd

Patch available

PoC Detected

Jun 23, 2025 - 20:46 vuln.today

Public exploit code

CVE Published

Mar 20, 2025 - 10:15 nvd

HIGH 8.1

DescriptionCVE.org

A stored cross-site scripting (XSS) vulnerability exists in flatpressblog/flatpress version 1.3. When a user uploads a file with a .xsig extension and directly accesses this file, the server responds with a Content-type of application/octet-stream, leading to the file being processed as an HTML file. This allows an attacker to execute arbitrary JavaScript code, which can be used to steal user cookies, perform HTTP requests, and access content of the same origin.

AnalysisAI

A stored cross-site scripting (XSS) vulnerability exists in flatpressblog/flatpress version 1.3. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

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 stored cross-site scripting (XSS) vulnerability exists in flatpressblog/flatpress version 1.3. When a user uploads a file with a .xsig extension and directly accesses this file, the server responds with a Content-type of application/octet-stream, leading to the file being processed as an HTML file. This allows an attacker to execute arbitrary JavaScript code, which can be used to steal user cookies, perform HTTP requests, and access content of the same origin. Affected products include: Flatpress. Version information: version 1.3..

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

CVE-2024-4023 vulnerability details – vuln.today

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