CVE-2025-40902 (GCVE-0-2025-40902)

Vulnerability from cvelistv5 – Published: 2026-05-19 13:21 – Updated: 2026-08-11 12:23
VLAI
Title
HTML injection in Users in Guardian/CMC before 26.1.0
Summary
A Stored HTML Injection vulnerability was discovered in the Users functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can create a malicious user whose username contains HTML tags. When a victim attempts to delete a group containing the affected user, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-19 14:04 UTC
CWE
  • CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
Assigner
Nozomi CNA under the mitre root
CNA scorecard B 81/100 over 60 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
Nozomi Networks Guardian Affected: 0 , < 26.1.0 (semver)
    cpe:2.3:a:nozomi_networks:guardian:*:*:*:*:*:*:*:*
Create a notification for this product.
Nozomi Networks CMC Affected: 0 , < 26.1.0 (semver)
    cpe:2.3:a:nozomi_networks:cmc:*:*:*:*:*:*:*:*
Create a notification for this product.
Siemens RUGGEDCOM APE1808 Affected: 0 , < * (custom)
guessed Create a notification for this product.
Date Public
2026-05-19 07:00
Show details on NVD website

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                  "value": "A Stored HTML Injection vulnerability was discovered in the Users functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can create a malicious user whose username contains HTML tags. When a victim attempts to delete a group containing the affected user, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration."
                }
              ],
              "value": "A Stored HTML Injection vulnerability was discovered in the Users functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can create a malicious user whose username contains HTML tags. When a victim attempts to delete a group containing the affected user, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-592",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-592 Stored XSS"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 4.8,
                "baseSeverity": "MEDIUM",
                "exploitMaturity": "NOT_DEFINED",
                "privilegesRequired": "HIGH",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "LOW",
                "subConfidentialityImpact": "LOW",
                "subIntegrityImpact": "LOW",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L",
                "version": "4.0",
                "vulnAvailabilityImpact": "LOW",
                "vulnConfidentialityImpact": "LOW",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            },
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "LOW",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "LOW",
                "privilegesRequired": "HIGH",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-79",
                  "description": "CWE-79 Improper neutralization of input during web page generation (\u0027cross-site scripting\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-19T13:21:02.668Z",
            "orgId": "bec8025f-a851-46e5-b3a3-058e6b0aa23c",
            "shortName": "Nozomi"
          },
          "references": [
            {
              "url": "https://security.nozominetworks.com/NN-2026:5-01"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Upgrade to v26.1.0 or later.\u003cbr\u003e"
                }
              ],
              "value": "Upgrade to v26.1.0 or later."
            }
          ],
          "source": {
            "discovery": "INTERNAL"
          },
          "title": "HTML injection in Users in Guardian/CMC before 26.1.0",
          "workarounds": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Use internal firewall features to limit access to the web management interface.\u003cbr\u003e"
                }
              ],
              "value": "Use internal firewall features to limit access to the web management interface."
            },
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Review all accounts with administrative access to it and delete unnecessary ones.\u003cbr\u003e"
                }
              ],
              "value": "Review all accounts with administrative access to it and delete unnecessary ones."
            },
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Review usernames of existing users.\u003cbr\u003e"
                }
              ],
              "value": "Review usernames of existing users."
            }
          ],
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "bec8025f-a851-46e5-b3a3-058e6b0aa23c",
        "assignerShortName": "Nozomi",
        "cveId": "CVE-2025-40902",
        "datePublished": "2026-05-19T13:21:02.668Z",
        "dateReserved": "2025-04-16T09:04:35.923Z",
        "dateUpdated": "2026-08-11T12:23:00.979Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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