Cyber Resilience

CVE-2024-39203

MediumPublic PoC

Published: 08 July 2024

Published
08 July 2024
Modified
13 March 2025
KEV Added
—
Patch
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CVSS Score v3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.0828 92.4th percentile
Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-39203 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Zblogcn Z-Blogphp. Its CVSS base score is 6.1 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique JavaScript (T1059.007); ranked in the top 7.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis

A cross-site scripting vulnerability exists in the Backend Theme Management module of Z-BlogPHP version 1.7.3. Identified as CVE-2024-39203 and assigned CWE-79, the flaw allows an attacker to supply a crafted payload that executes arbitrary web scripts or HTML in the context of the application.

An unauthenticated remote attacker can trigger the issue by causing a user to interact with malicious content, resulting in limited effects on confidentiality and integrity with changed scope. The vulnerability is rated 6.1 under CVSS 3.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N). Its EPSS score has remained flat at 0.0828 with no material increase since disclosure.

EU & UK References

Vulnerability details

A cross-site scripting (XSS) vulnerability in the Backend Theme Management module of Z-BlogPHP v1.7.3 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

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 →
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 →
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 →
Why these techniques?

Stored XSS vulnerability enables arbitrary JavaScript execution in authenticated users' browsers (T1059.007), exploitation of a public-facing web application (T1190), browser session hijacking (T1185), and theft of web session cookies (T1539) or browser credentials (T1503, T1555.003).

Affected Assets

zblogcn
z-blogphp
≤ 1.7.3.3230

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