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CVE-2025-40899: High Vulnerability in Nozomi Networks Assets and Nodes

A high-severity Stored Cross-Site Scripting vulnerability in Nozomi Networks' Assets and Nodes functionality can lead to unauthorized actions by attackers. Organizations must prioritize patching to mitigate risks.

HIGHCVSS 7.1 · Published April 15, 2026

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A Stored Cross-Site Scripting vulnerability was discovered in the Assets and Nodes functionality due to improper validation of an input parameter. An authenticated user with custom fields privileges can define a malicious custom field containing a JavaScript payload. When the victim views the Assets or Nodes pages, the XSS executes in their browser context, allowing the attacker to perform unauthorized actions as the victim, such as modify application data, disrupt application availability, and access limited sensitive information.

With a CVSS score of 7.1, this vulnerability is classified as high severity, indicating significant risk potential. The reliance on network access and low attack complexity means that this vulnerability could be exploited by attackers with minimal effort. Organizations must recognize the importance of addressing this vulnerability promptly.

Risk to organizations includes unauthorized data modification, application disruption, and sensitive information exposure. Given the potential consequences, organizations should prioritize patching immediately.

As of now, there are no public exploits or confirmed active exploitation for this vulnerability, but the risk remains substantial, and timely remediation is critical.

Vulnerability Details

The vulnerability allows attackers to leverage stored cross-site scripting, which can be triggered when users interact with the affected Assets and Nodes pages. The CVSS score of 7.1 corresponds to a high severity classification, emphasizing the need for immediate action. This vulnerability affects all versions prior to the vendor patch, which is crucial for organizations using the affected products.

Technical Analysis

The root cause of this vulnerability is improper input validation, which allows an attacker to craft malicious JavaScript payloads. The attack vector is network-based, requiring minimal privileges and passive user interaction. The complexity of the attack remains low, making it feasible for many attackers. The integrity impact is high, with potential for significant data alteration, while availability and confidentiality impacts are also notable.

Risk & Impact Analysis

The real-world deployment risk for this vulnerability is considerable. Attackers may leverage it to gain unauthorized access to sensitive functions within the application. Organizations should evaluate the blast radius of an exploit, as this vulnerability can affect multiple users if not mitigated effectively. The urgency of addressing this vulnerability is high, considering its CVSS score and the potential for exploitation.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

All versions prior to vendor patch are affected by this vulnerability. Organizations using Nozomi Networks products should ensure that they update to the latest version to mitigate risks.

Mitigation & Remediation

To remediate this vulnerability, organizations should immediately apply the vendor's patch and monitor for any unauthorized access attempts. In addition, implementing input validation mechanisms can help prevent such issues in the future. Organizations should also consider conducting a thorough application security assessment to identify further vulnerabilities.

Detection Guidance

Organizations should monitor logs for unusual activity on the Assets and Nodes pages. Behavioral anomalies, such as unauthorized data modifications or unexpected application behavior, should be investigated promptly.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability highlights the importance of robust input validation in web applications. Security teams should learn from this incident to fortify their applications against similar vulnerabilities. It is also critical to stay updated with security patches to mitigate risks. For further insights, organizations can explore penetration testing methodologies and vulnerability management programs to enhance their security posture.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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