{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-115479",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-22T15:06:52.738Z",
        "datePublished": "2026-10-23T13:36:01.655Z",
        "dateUpdated": "2026-10-30T20:03:07.037Z"
    },
    "containers": {
        "cna": {
            "title": "baserCMS: Mail-form auto-replies accept multiple visitor-controlled recipients",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-20",
                            "lang": "en",
                            "description": "CWE-20: Improper Input Validation",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "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"
                    }
                }
            ],
            "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"
                }
            ],
            "affected": [
                {
                    "vendor": "baserproject",
                    "product": "basercms",
                    "versions": [
                        {
                            "version": ">= 5.2.5, < 5.3.2",
                            "status": "affected"
                        },
                        {
                            "version": ">= 5.4.0, < 5.4.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-23T13:36:01.655Z"
            },
            "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's 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(',') 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's 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."
                }
            ],
            "source": {
                "advisory": "GHSA-w47c-4g8m-gjv9",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-30T20:02:58.080021Z",
                                "id": "CVE-2026-115479",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-30T20:03:07.037Z"
                }
            }
        ]
    }
}