{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "basercms",
          "vendor": "baserproject",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.2.5, \u003c 5.3.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.4.0, \u003c 5.4.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "baserCMS is a website development framework. In versions 5.2.5 before 5.3.2 and 5.4.0 before 5.4.2, an unauthenticated visitor can supply a comma-separated address list in a public mail form\u0027s email field and cause a single auto-reply to be addressed to multiple third parties. MailMessageMailer::sendFormToUser() passes the visitor-controlled userMail value to parseAndNormalizeMailAddresses(), which splits it with explode(\u0027,\u0027) and supplies every resulting address to setTo(). Newly created forms with an email-type field are affected when the separate, optional VALID_EMAIL server-side validation is not enabled; browser type=email validation does not prevent crafted requests. The bundled contact form enables VALID_EMAIL and is not affected. The auto-reply uses the site\u0027s sender identity and includes partially attacker-controlled content, allowing abuse of the site to deliver unsolicited mail. This issue has been patched in versions 5.3.2 and 5.4.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T13:36:01.655Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/baserproject/basercms/security/advisories/GHSA-w47c-4g8m-gjv9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-w47c-4g8m-gjv9"
        },
        {
          "name": "https://github.com/baserproject/basercms/commit/99e6257c9d5e2fa2bff2351defcb9fb37f69daf1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/baserproject/basercms/commit/99e6257c9d5e2fa2bff2351defcb9fb37f69daf1"
        },
        {
          "name": "https://github.com/baserproject/basercms/releases/tag/5.3.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/baserproject/basercms/releases/tag/5.3.2"
        },
        {
          "name": "https://github.com/baserproject/basercms/releases/tag/5.4.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/baserproject/basercms/releases/tag/5.4.2"
        }
      ],
      "source": {
        "advisory": "GHSA-w47c-4g8m-gjv9",
        "discovery": "UNKNOWN"
      },
      "title": "baserCMS: Mail-form auto-replies accept multiple visitor-controlled recipients"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115479",
    "datePublished": "2026-10-23T13:36:01.655Z",
    "dateReserved": "2026-10-22T15:06:52.738Z",
    "dateUpdated": "2026-10-23T13:36:01.655Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}