NN-2026:2-01

Vulnerability from csaf_nozominetworks - Published: 2026-04-15 11:00 - Updated: 2026-04-15 11:00
Summary
Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0
Severity
High
Notes
Risk Level for Nozomi customers: High
CVE-2025-40899
8.9 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Mitigation Use internal firewall features to limit access to the web management interface. Review all accounts with access to it and delete unnecessary ones. Review existing custom fields.
Vendor Fix Upgrade to v26.0.0 or later.
References
Acknowledgments
Nozomi Networks Product Security team Andrea Palanca
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "HIGH"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "other",
        "text": "High",
        "title": "Risk Level for Nozomi customers"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "Nozomi Networks Product Security team can be reached at prodsec@nozominetworks.com",
      "name": "Nozomi Networks Product Security",
      "namespace": "https://security.nozominetworks.com/psirt"
    },
    "title": "Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0",
    "tracking": {
      "aliases": [
        "CVE-2025-40899"
      ],
      "current_release_date": "2026-04-15T11:00:00.000Z",
      "id": "NN-2026:2-01",
      "initial_release_date": "2026-04-15T11:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-04-15T11:00:00.000Z",
          "number": "1",
          "summary": "Initial revision"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:gem/\u003c26.0.0",
                "product": {
                  "name": "Nozomi Networks Guardian \u003c26.0.0",
                  "product_id": "CSAFPID-0001"
                }
              },
              {
                "category": "product_version",
                "name": "26.0.0",
                "product": {
                  "name": "Nozomi Networks Guardian 26.0.0",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "Guardian"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:gem/\u003c26.0.0",
                "product": {
                  "name": "Nozomi Networks CMC \u003c26.0.0",
                  "product_id": "CSAFPID-0003"
                }
              },
              {
                "category": "product_version",
                "name": "26.0.0",
                "product": {
                  "name": "Nozomi Networks CMC 26.0.0",
                  "product_id": "CSAFPID-0004"
                }
              }
            ],
            "category": "product_name",
            "name": "CMC"
          }
        ],
        "category": "vendor",
        "name": "Nozomi Networks"
      }
    ]
  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Andrea Palanca"
          ],
          "organization": "Nozomi Networks Product Security team",
          "summary": "finding this issue during an internal investigation"
        }
      ],
      "cve": "CVE-2025-40899",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
      "discovery_date": "2026-04-15T11:00:00.000Z",
      "ids": [
        {
          "system_name": "Nozomi Networks Security Advisory ID",
          "text": "NN-2026:2-01"
        }
      ],
      "notes": [
        {
          "category": "summary",
          "text": "A Stored Cross-Site Scripting vulnerability was discovered in the Assets and Nodes functionality due to improper validation of an input parameter.",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-0002",
          "CSAFPID-0004"
        ],
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0003"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "Mitre CVE entry",
          "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-40899"
        },
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://security.nozominetworks.com/csaf/2026/nn-2026_2-01.json"
        },
        {
          "category": "self",
          "summary": "Human-readable advisory.",
          "url": "https://security.nozominetworks.com/NN-2026:2-01"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Use internal firewall features to limit access to the web management interface. Review all accounts with access to it and delete unnecessary ones. Review existing custom fields.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0003"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Upgrade to v26.0.0 or later.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0003"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.9,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0003"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "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."
        }
      ],
      "title": "Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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