CVE-2026-115480

{
  "id": "CVE-2026-115480",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-23T14:17:52.160",
  "lastModified": "2026-10-29T18:17:24.010",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "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's 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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "baserproject",
          "product": "basercms",
          "versions": [
            {
              "version": ">= 5.0.0, < 5.3.2",
              "status": "affected"
            },
            {
              "version": ">= 5.4.0, < 5.4.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-29T17:45:56.666716Z",
          "id": "CVE-2026-115480",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-693"
        },
        {
          "lang": "en",
          "value": "CWE-799"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/baserproject/basercms/commit/3444154ca40f308ade8991e54459248f866dcf61",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/baserproject/basercms/releases/tag/5.3.2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/baserproject/basercms/releases/tag/5.4.2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-cpxq-6gjp-m59g",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-cpxq-6gjp-m59g",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}