A vulnerability classified as critical was found in hzmanyun Education and Training System 3.1.1. This vulnerability affects the function saveImage. The manipulation of the argument file leads to unrestricted upload. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
The severity level of this vulnerability is medium, with a CVSS score of 6.9. This indicates a notable risk to organizations, as the vulnerability can be exploited with low complexity and no user interaction required.
Organizations should prioritize patching immediately to mitigate potential exploitation. The potential for unauthorized file uploads presents significant security concerns, particularly in environments where sensitive data is processed.
The following sections will provide detailed insights into the vulnerability, technical analysis, risk assessment, and mitigation strategies.
Vulnerability Details
The vulnerability in the hzmanyun Education and Training System allows attackers to upload arbitrary files due to improper validation of input in the saveImage function. This leads to unrestricted file uploads, which can be exploited for further attacks, including remote code execution.
The CVSS score of 6.9 represents a medium severity level, indicating that organizations should take this vulnerability seriously. The vulnerability was published on February 21, 2025.
The CWE classifications associated with this vulnerability are CWE-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type). These classifications highlight the underlying issues in the code that can lead to exploitation.
Technical Analysis
The root cause of this vulnerability is the lack of proper validation for the file argument in the saveImage function. Attackers can initiate an attack remotely without needing any privileges or user interaction.
The attack vector is network-based, and the attack complexity is low, making it easier for attackers to exploit this vulnerability. There are no privileges required, and user interaction is not necessary.
The confidentiality, integrity, and availability impacts of this vulnerability are all categorized as low. However, the potential for unrestricted file uploads could lead to more severe consequences if exploited.
Risk & Impact Analysis
Risk to organizations includes unauthorized file uploads, which could lead to data breaches, loss of integrity, and potential service disruptions. The blast radius for this vulnerability is significant, especially for organizations that handle sensitive data.
Organizations should assess their exposure to this vulnerability and prioritize remediation efforts accordingly. Given the low attack complexity and the ability for remote exploitation, timely patching is crucial.
The urgency for addressing this vulnerability is high, and organizations should schedule remediation within their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version of the hzmanyun Education and Training System is 3.1.1. Organizations should consider all versions prior to the vendor patch as vulnerable.
Mitigation & Remediation
Organizations must apply the latest patches to the hzmanyun Education and Training System to remediate this vulnerability effectively. If a patch is not available, consider implementing workarounds such as disabling the saveImage function temporarily.
Additionally, configuration hardening should be performed to limit file uploads to trusted sources only. Regular monitoring for unusual activity related to file uploads is also recommended.
Penetration testing can help organizations identify and address similar vulnerabilities in their systems.
Detection Guidance
Organizations should monitor logs for unauthorized file uploads and review any changes made to the saveImage function. Behavioral anomalies in file handling should be flagged for further investigation.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing challenges organizations face regarding file upload security. The unrestricted upload of files remains a prevalent threat vector that can lead to severe consequences.
Security teams should take this opportunity to review their current policies and practices around file uploads and implement robust validation mechanisms.
A vulnerability management program can help organizations effectively manage and mitigate risks associated with vulnerabilities like this one.
Penetration testing methodology should be revisited to ensure it encompasses the latest threat intelligence insights.
API penetration testing practices should be adapted to incorporate lessons learned from this vulnerability.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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