A vulnerability classified as problematic was found in FiberHome AN5506-01A ONU GPON RP2511. This vulnerability allows remote attackers to perform cross-site scripting (XSS) attacks through manipulation of the argument Description within the NAT submenu. The manipulation can be executed remotely, posing a significant risk.
With a CVSS score of 4.8, this vulnerability is categorized as medium severity. The risk to organizations includes potential unauthorized access and data manipulation, which underscores the urgency for defenders to address this issue promptly.
This vulnerability is particularly concerning as it requires high privileges for exploitation, although it can be performed passively by targeted users. The lack of vendor response to early disclosure attempts indicates a potential gap in communication and remediation efforts.
Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability, especially given its potential impact on operational security.
Vulnerability Details
Officially, the vulnerability has been described as impacting an unknown functionality of the NAT submenu in the FiberHome AN5506-01A ONU GPON RP2511. The CVSS score provided by the vendor is 4.8, indicating a medium severity level with particular implications for confidentiality and integrity.
The attack vector is classified as network-based, with low complexity for execution, requiring high privileges and passive user interaction. The integrity impact is noted as low, while confidentiality and availability impacts are negligible.
The vulnerability was published on February 24, 2025, and the responsible vendor has not yet remediated the issue, further emphasizing the need for organizations to take proactive measures.
Technical Analysis
The root cause of this vulnerability lies in insufficient input validation on the NAT submenu's Description parameter. Attackers may leverage this oversight to insert malicious scripts, leading to XSS vulnerabilities. The attack can be executed remotely, primarily targeting users with high privileges.
The attack complexity is low, indicating that an attacker does not require advanced skills or resources to exploit this vulnerability. High privileges are necessary for the initial action, but once the XSS payload is executed, it can affect users without any additional privileges.
There is no requirement for user interaction in the traditional sense, as the vulnerability can be exploited through crafted requests, making it imperative for the organization to monitor network traffic and user behavior closely.
Risk & Impact Analysis
Real-world deployment risk associated with this vulnerability is significant, considering the potential for data theft and unauthorized access to sensitive systems. Organizations utilizing the affected FiberHome product should assess their exposure and take appropriate action.
The blast radius potential is high, as the vulnerability can be exploited remotely, affecting any user interacting with the compromised system. Organizations should consider this vulnerability as part of their risk assessment and mitigation strategies.
Given the medium severity rating, organizations should address this vulnerability during their priority patch cycle to ensure that defenses remain robust against potential exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include the FiberHome AN5506-01A ONU GPON RP2511 firmware version. All versions prior to vendor patch are likely susceptible to this vulnerability.
Mitigation & Remediation
Organizations should implement the latest firmware updates from FiberHome to remediate this vulnerability. If a patch is not available, consider implementing configuration hardening and network controls to restrict access to the affected component.
Monitoring for unusual activity in the NAT submenu and implementing web application firewalls can help mitigate potential exploitation of this vulnerability.
For further assistance, organizations may seek services such as penetration testing to identify and address vulnerabilities effectively.
Detection Guidance
Organizations should monitor logs for indicators of unauthorized access attempts and unusual behavior patterns associated with the NAT submenu. Additionally, network signatures that detect XSS attempts should be established.
System changes that deviate from established norms should be flagged for review as part of a comprehensive security monitoring strategy.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability could reflect broader trends in web application security, particularly the ongoing prevalence of cross-site scripting vulnerabilities. Security teams should take this incident as a learning opportunity to strengthen their overall application security posture.
It is crucial for organizations to continuously assess their vulnerability management programs. For comprehensive strategies, organizations can refer to the vulnerability management program design guide.
Integrating effective penetration testing and threat modeling strategies can significantly reduce an organization's risk exposure. For more insights, organizations are encouraged to read about penetration testing methodology to enhance their defensive capabilities.
Finally, organizations should maintain awareness of evolving threats and vulnerabilities through continuous monitoring and adaptation of their security practices. Resources such as the AI security best practices guide can provide valuable insights.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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