CVE-2025-40899
Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0
CVSS Score
8.9
EPSS Score
0.0%
EPSS Percentile
10th
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.
| CWE | CWE-79 |
| Vendor | nozomi networks |
| Product | guardian |
| Published | Apr 15, 2026 |
| Last Updated | Apr 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
High
Affected Versions
Nozomi Networks / Guardian
0 < 26.0.0
Nozomi Networks / CMC
0 < 26.0.0
References
Credits
This issue was found by Andrea Palanca of Nozomi Networks Product Security team during an internal investigation.