CVE-2025-1946: Hzmanyun Education System RCE Vulnerability

CVE-2025-1946 Overview

A command injection vulnerability has been discovered in the hzmanyun Education and Training System version 2.1. This vulnerability affects the exportPDF function located in the /user/exportPDF endpoint. Through manipulation of the id parameter, an authenticated attacker can inject arbitrary operating system commands that are executed on the underlying server. The vulnerability can be exploited remotely over the network, and exploit details have been publicly disclosed.

Critical Impact

Remote attackers with low privileges can execute arbitrary commands on affected systems, potentially leading to complete system compromise, data exfiltration, and lateral movement within the network.

Affected Products

• hzmanyun Education and Training System version 2.1

Discovery Timeline

• 2025-03-04 - CVE-2025-1946 published to NVD
• 2026-01-29 - Last updated in NVD database

Technical Details for CVE-2025-1946

Vulnerability Analysis

This vulnerability is classified as a command injection flaw (CWE-77) with an underlying injection weakness (CWE-74). The vulnerability exists within the PDF export functionality of the Education and Training System, a web-based educational platform. The exportPDF function fails to properly sanitize or validate user-supplied input before incorporating it into system commands.

When processing PDF export requests, the application takes the id parameter from incoming requests and passes it to underlying system functions without adequate input validation. This allows an attacker to append malicious command sequences that the operating system interprets and executes with the privileges of the web application process.

The network-based attack vector means exploitation requires no physical access to the target system. While the attacker needs low-level authentication to access the vulnerable endpoint, the exploitation complexity is low, making this vulnerability accessible to attackers with limited technical expertise.

Root Cause

The root cause of this vulnerability is improper input validation and insufficient sanitization of the id parameter before it is passed to system command execution functions. The application fails to implement proper input validation controls such as allowlisting acceptable characters, escaping shell metacharacters, or using parameterized command interfaces that prevent injection attacks.

Attack Vector

The attack is conducted remotely over the network by sending crafted HTTP requests to the /user/exportPDF endpoint. An authenticated attacker manipulates the id parameter by injecting shell metacharacters and commands. Common injection techniques include using command separators such as semicolons, pipes, or ampersands to chain malicious commands after the legitimate parameter value.

For example, an attacker might inject shell commands that spawn reverse shells, download and execute malicious payloads, or exfiltrate sensitive data from the server. The vulnerability details have been publicly disclosed via a GitHub report, and additional technical information is available through VulDB.

Detection Methods for CVE-2025-1946

Indicators of Compromise

• Unusual HTTP requests to /user/exportPDF containing shell metacharacters such as ;, |, &, $(), or backticks in the id parameter
• Unexpected process spawning from the web application process, particularly shell interpreters or network utilities
• Outbound network connections from the web server to unknown external hosts
• Creation of unexpected files or modifications to system configurations by the web application user

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing common command injection patterns targeting the /user/exportPDF endpoint
• Deploy intrusion detection system (IDS) signatures to identify command injection attempts in HTTP traffic
• Monitor application logs for requests to the PDF export functionality with abnormal parameter values
• Utilize endpoint detection and response (EDR) solutions to detect suspicious process execution chains originating from web server processes

Monitoring Recommendations

• Enable detailed logging for all requests to the /user/exportPDF endpoint and review logs regularly for suspicious activity
• Configure alerts for shell process spawning by the web application service account
• Monitor network traffic from the web server for unexpected outbound connections, particularly to non-standard ports
• Implement file integrity monitoring on critical system directories to detect unauthorized modifications

How to Mitigate CVE-2025-1946

Immediate Actions Required

• Restrict network access to the hzmanyun Education and Training System to trusted networks and users only
• Implement web application firewall rules to filter malicious input targeting the /user/exportPDF endpoint
• Review access logs for evidence of exploitation attempts and investigate any suspicious activity
• Consider temporarily disabling the PDF export functionality until a patch is available

Patch Information

No official vendor patch has been identified in the available CVE data. Organizations should monitor the vendor for security updates and apply patches immediately when available. Technical details about this vulnerability are documented in the GitHub security report and VulDB entry #298520.

Workarounds

• Implement strict input validation on the id parameter, allowing only numeric or expected alphanumeric values
• Deploy a reverse proxy or WAF in front of the application to filter requests containing command injection patterns
• Run the web application with minimal privileges to limit the impact of successful exploitation
• Segment the network to isolate the Education and Training System from critical infrastructure and sensitive data stores

# Example WAF rule to block common command injection patterns
# Add to ModSecurity or similar WAF configuration
SecRule ARGS:id "@rx [;&|$`]" "id:1001,phase:2,deny,status:403,msg:'Potential command injection in exportPDF id parameter'"