Cyber Resilience

CVE-2024-33209

MediumPublic PoC

Published: 02 October 2024

Published
02 October 2024
Modified
14 March 2025
KEV Added
—
Patch
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CVSS Score v3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.0624 91.1th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-33209 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Flatpress Flatpress. Its CVSS base score is 5.4 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique JavaScript (T1059.007); ranked in the top 8.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis

FlatPress version 1.3 contains a stored cross-site scripting vulnerability (CWE-79) that permits injection of malicious JavaScript through the "Add New Entry" blog-post functionality. The flaw is rated CVSS 5.4 and requires an authenticated user account with the ability to create entries.

An attacker who can post new content may embed arbitrary script that executes in the browser of any subsequent visitor or administrator who views the affected entry, enabling theft of session tokens or other actions within the victim's browser context. The EPSS score has remained flat at 0.0624 since disclosure, indicating no measurable increase in observed exploitation interest.

A single public reference describes the issue but supplies no official patch or mitigation guidance from the FlatPress project.

EU & UK References

Vulnerability details

FlatPress v1.3 is vulnerable to Cross Site Scripting (XSS). An attacker can inject malicious JavaScript code into the "Add New Entry" section, which allows them to execute arbitrary code in the context of a victim's web browser.

CWE(s)
CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1059.007 JavaScript Execution
Adversaries may abuse various implementations of JavaScript for execution.
attack.mitre.org →
T1185 Browser Session Hijacking Collection
Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1539 Steal Web Session Cookie Credential Access
An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.
attack.mitre.org →
T1555.003 Credentials from Web Browsers Credential Access
Adversaries may acquire credentials from web browsers by reading files specific to the target browser.
attack.mitre.org →
Why these techniques?

XSS vulnerability enables arbitrary JavaScript execution in victim browsers (T1059.007, T1190), allowing session hijacking (T1185), and theft of session cookies and browser credentials (T1539, T1555.003) as described in impacts.

Affected Assets

flatpress
flatpress
1.3

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References