{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "basercms",
          "vendor": "baserproject",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \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 5.0.0 before 5.3.2 and 5.4.0 before 5.4.2, the public POST /baser/api/bc-mail/mail_messages/add/{mailContentId}.json endpoint accepts submissions without enforcing the form\u0027s auth_captcha setting. BcMail\\Controller\\Api\\MailMessagesController::add() and MailMessagesService::create() omit the BcCaptchaService::check() verification of captcha_id and auth_captcha performed by MailController::submit() in the web UI. An unauthenticated attacker who can reach the API can therefore automate submissions without solving the enabled image challenge. The API disables FormProtection and has no rate limit; submissions can generate administrator-inbox spam, send attacker-influenced auto-replies to third parties when an email field is present, and accumulate mail_messages database records when save_info is enabled. The API already enforces the isAccepting() check added for CVE-2026-30878; the missing CAPTCHA check is a separate control failure. 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-799",
              "description": "CWE-799: Improper Control of Interaction Frequency",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-693",
              "description": "CWE-693: Protection Mechanism Failure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T13:37:32.184Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/baserproject/basercms/security/advisories/GHSA-cpxq-6gjp-m59g",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-cpxq-6gjp-m59g"
        },
        {
          "name": "https://github.com/baserproject/basercms/commit/3444154ca40f308ade8991e54459248f866dcf61",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/baserproject/basercms/commit/3444154ca40f308ade8991e54459248f866dcf61"
        },
        {
          "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-cpxq-6gjp-m59g",
        "discovery": "UNKNOWN"
      },
      "title": "baserCMS: Public Web API mail-form submission bypasses image CAPTCHA"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115480",
    "datePublished": "2026-10-23T13:37:32.184Z",
    "dateReserved": "2026-10-22T15:06:52.738Z",
    "dateUpdated": "2026-10-23T13:37:32.184Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}