{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75872",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-18T16:04:23.484003Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-18T16:04:29.499Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Public subscription form"
          ],
          "product": "MailerUp",
          "programFiles": [
            "backend/apps/forms/views.py"
          ],
          "repo": "https://github.com/maalfer/mailerup",
          "vendor": "maalfer",
          "versions": [
            {
              "lessThan": "1.1.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:maalfer:mailerup:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.1.3",
                  "versionStartIncluding": "0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "OR"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Nacho Garc\u00eda Egea"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Xo\u00e1n M. Otero Jorge"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Secur0 CNA"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Mario \u00c1lvarez Fern\u00e1ndez"
        }
      ],
      "datePublic": "2026-08-18T12:43:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "HTML Injection in the public subscription form in maalfer MailerUp before 1.1.3 allows unauthenticated remote attackers to have the application send a message carrying arbitrary HTML, to an attacker-chosen address and from the form owner\u0027s configured sending identity, via the first_name field of the subscription request, which is interpolated unescaped into the double opt-in verification email."
            }
          ],
          "value": "HTML Injection in the public subscription form in maalfer MailerUp before 1.1.3 allows unauthenticated remote attackers to have the application send a message carrying arbitrary HTML, to an attacker-chosen address and from the form owner\u0027s configured sending identity, via the first_name field of the subscription request, which is interpolated unescaped into the double opt-in verification email."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-242",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-242 Code Injection"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-80",
              "description": "CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-18T14:06:37.102Z",
        "orgId": "4daa8cea-433a-44bd-9456-53b127fc289a",
        "shortName": "Secur0"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/maalfer/mailerup/commit/da4aedc9621911df4ce0cc8f0b321dd6d10f40a5"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/maalfer/mailerup/releases/tag/v1.1.3"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://secur0.com/en/cna/cve-list/cve-2026-75872-html-injection-in-mailerup-double-optin-verification-email"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cstrong\u003e\u003c/strong\u003e Upgrade to version 1.1.3 or higher."
            }
          ],
          "value": "Upgrade to version 1.1.3 or higher."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "tags": [
        "x_open-source"
      ],
      "title": "HTML Injection in MailerUp double opt-in verification email",
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "4daa8cea-433a-44bd-9456-53b127fc289a",
    "assignerShortName": "Secur0",
    "cveId": "CVE-2026-75872",
    "datePublished": "2026-08-18T14:06:37.102Z",
    "dateReserved": "2026-08-18T12:20:39.352Z",
    "dateUpdated": "2026-08-18T16:04:29.499Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}