A vulnerability was determined in kerwincui FastBee up to version 1.2.1. This vulnerability allows cross-site scripting (XSS) through manipulation of the argument noticeContent in the function Add of the file springboot/fastbee-admin/src/main/java/com/fastbee/web/controller/system/SysNoticeController.java. The vulnerability enables remote attackers to exploit the application, thereby potentially executing arbitrary scripts in a user's browser. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way. As a result, organizations using this software should be aware of their exposure to this vulnerability and take appropriate measures.
The CVSS score for this vulnerability is 2, categorized as low severity. This low score indicates that while the vulnerability does pose a risk, it may not be an immediate threat for all organizations. However, organizations should still assess their environment to determine if they are affected.
Risk to organizations includes potential data exposure through cross-site scripting attacks, which could lead to unauthorized actions performed on behalf of the user. Organizations should prioritize patching immediately to mitigate any potential impact.
Given the nature of the vulnerability and its potential for exploitation, organizations utilizing the affected versions of kerwincui FastBee should take swift action to address this vulnerability in their environments.
Vulnerability Details
This vulnerability was disclosed on May 3, 2026, and is categorized under CWE-79 (Improper Neutralization of Input During Web Page Generation) and CWE-94 (Code Injection).
The CVSS score details are as follows:
Metric | Value |
|---|---|
CVSS Version | 4.0 |
Base Score | 2 |
Attack Vector | NETWORK |
Attack Complexity | LOW |
User Interaction | REQUIRED |
Technical Analysis
The root cause of this vulnerability lies in improper input validation within the function responsible for handling system notices. Attackers may leverage this vulnerability to inject malicious scripts that execute in the context of the user’s session.
The attack vector is network-based, meaning that the vulnerability can be exploited remotely without physical access to the system. The attack complexity is low, indicating that a successful exploit does not require significant skill or resources.
The required privileges for exploitation are low, as an attacker does not need elevated permissions to initiate the attack. User interaction is required, as the victim must engage with the malicious content to trigger the exploit.
In terms of impact, the vulnerability can lead to a low integrity impact, as attackers may manipulate the integrity of user interactions without affecting the overall system availability or confidentiality.
Risk & Impact Analysis
Organizations utilizing kerwincui FastBee must assess the potential risks posed by this vulnerability. Given the low severity rating, the immediate risk may be considered manageable; however, organizations should not underestimate the potential for exploitation.
Risk to organizations includes potential data exposure through cross-site scripting attacks, which could lead to unauthorized actions performed on behalf of the user. The blast radius may include any user interacting with the affected component, allowing attackers to execute scripts that could capture sensitive information.
Organizations should address this vulnerability in their priority patch cycle. Patching or applying mitigations will help to protect against potential exploitation and reduce the risk of compromised user sessions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of kerwincui FastBee prior to 1.2.1 are affected by this vulnerability. Organizations should ensure they are running the latest version or apply relevant security patches.
Mitigation & Remediation
Organizations should prioritize patching immediately to address this vulnerability. The vendor has not provided a patch as of yet, so organizations may need to implement workarounds such as input validation or filtering for the noticeContent parameter.
In the absence of a patch, organizations can enhance security by implementing strong input validation mechanisms, ensuring user inputs are sanitized and that only expected content is processed.
Organizations should also consider network controls that limit access to the affected application. Regular monitoring and security assessments can help identify any unusual activity that may indicate an exploitation attempt.
For further insights on penetration testing and security assessments, organizations can refer to our penetration testing services to assess their security posture.
Detection Guidance
Organizations should monitor logs for any indications of payloads being submitted to the noticeContent parameter. Look for unusual JavaScript execution attempts or unexpected user interactions that could signify exploitation.
Behavioral anomalies such as unexpected redirects or JavaScript errors may also indicate attempts to exploit this vulnerability.
Network signatures that reflect exploit attempts can be established to enhance detection capabilities further.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in the continued exploitation of similar XSS vulnerabilities across web applications. Organizations must remain vigilant and adopt a proactive stance towards security.
This incident highlights the importance of regular security assessments and prompt responses to vulnerabilities. Security teams are encouraged to implement a comprehensive security framework.
For more insights on vulnerability management, organizations can explore our vulnerability management program resources to strengthen their defenses.
To further enhance application security, organizations can look into our web application penetration testing guide.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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