CVE-2024-54724

CriticalRCE

Published: 09 January 2025

Published

09 January 2025

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0034 57.1th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-54724 is a critical-severity Code Injection (CWE-94) vulnerability in Phpyun (inferred from references). Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 42.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-2 (Flaw Remediation) and SI-7 (Software, Firmware, and Information Integrity).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Directly remediates the backdoor vulnerability in PHPYun by applying patches or upgrading to version 7.0.2 or later as recommended.

SI-7 Software, Firmware, and Information Integrity good match

preventdetect

Monitors and verifies the integrity of application files to detect and prevent unauthorized modifications from the backdoor's arbitrary file writing.

SI-10 Information Input Validation partial match

prevent

Validates user inputs to block malicious payloads exploiting the backdoor for file inclusion and code injection.

MITRE ATT&CK Enterprise TechniquesAI

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 →

T1100 Web Shell Persistence

A Web shell is a Web script that is placed on an openly accessible Web server to allow an adversary to use the Web server as a gateway into a network.

attack.mitre.org →

Why these techniques?

Direct RCE via unauthenticated exploitation of public-facing PHP app backdoor using file write + inclusion, enabling web shell deployment.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

PHPYun before 7.0.2 is vulnerable to code execution through backdoor-restricted arbitrary file writing and file inclusion.

Deeper analysisAI

CVE-2024-54724 is a critical code execution vulnerability in PHPYun versions prior to 7.0.2, stemming from a backdoor that enables restricted arbitrary file writing combined with file inclusion. Classified under CWE-94 (Code Injection), it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), highlighting its potential for severe impact due to network accessibility, low attack complexity, and no prerequisites for privileges or user interaction.

Remote, unauthenticated attackers can exploit this vulnerability over the network to achieve arbitrary code execution on the target system. By leveraging the backdoor's file writing and inclusion mechanisms, attackers gain high-level control over confidentiality, integrity, and availability, potentially leading to full system compromise.

Advisories recommend upgrading to PHPYun 7.0.2 or later to mitigate the issue. Further details are provided in references at http://phpyun.com and https://github.com/la12138la/detail/blob/main/1.md.