GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2023-50455 (GCVE-0-2023-50455)

Vulnerability from cvelistv5 – Published: 2023-12-10 00:00 – Updated: 2024-08-28 15:21
VLAI
Summary
An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the "email address verification" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-28 15:19 UTC
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T22:16:46.714Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://zammad.com/en/advisories/zaa-2023-06"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-50455",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-28T15:19:58.637243Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-28T15:21:46.918Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email address verification\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-12-10T18:49:13.949Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://zammad.com/en/advisories/zaa-2023-06"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2023-50455",
    "datePublished": "2023-12-10T00:00:00.000Z",
    "dateReserved": "2023-12-10T00:00:00.000Z",
    "dateUpdated": "2024-08-28T15:21:46.918Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-50455",
      "date": "2026-09-15",
      "epss": "0.00701",
      "percentile": "0.51329"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:zammad:zammad:6.1.0:-:*:*:*:*:*:*\", \"matchCriteriaId\": \"A246CC7D-8B52-43CC-A4F6-7E6C63D56740\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:zammad:zammad:6.1.0:alpha:*:*:*:*:*:*\", \"matchCriteriaId\": \"226C3449-B353-4B93-AC0E-F9D6367FC962\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:zammad:zammad:6.2.0:alpha:*:*:*:*:*:*\", \"matchCriteriaId\": \"98188727-1BBE-4691-8968-5E7047F19793\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \\\"email address verification\\\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).\"}, {\"lang\": \"es\", \"value\": \"Se descubri\\u00f3 un problema en Zammad antes de la versi\\u00f3n 6.2.0. Debido a la falta de limitaci\\u00f3n de velocidad en la funci\\u00f3n \\\"verificaci\\u00f3n de direcci\\u00f3n de correo electr\\u00f3nico\\\", un atacante podr\\u00eda enviar muchas solicitudes a una direcci\\u00f3n conocida para provocar una denegaci\\u00f3n de servicio (generaci\\u00f3n de muchos correos electr\\u00f3nicos, que tambi\\u00e9n enviar\\u00edan spam a la v\\u00edctima).\"}]",
      "id": "CVE-2023-50455",
      "lastModified": "2024-11-21T08:37:01.837",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}]}",
      "published": "2023-12-10T19:15:07.580",
      "references": "[{\"url\": \"https://zammad.com/en/advisories/zaa-2023-06\", \"source\": \"cve@mitre.org\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://zammad.com/en/advisories/zaa-2023-06\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-770\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-50455\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2023-12-10T19:15:07.580\",\"lastModified\":\"2026-06-17T06:39:39.947\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \\\"email address verification\\\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).\"},{\"lang\":\"es\",\"value\":\"Se descubri\u00f3 un problema en Zammad antes de la versi\u00f3n 6.2.0. Debido a la falta de limitaci\u00f3n de velocidad en la funci\u00f3n \\\"verificaci\u00f3n de direcci\u00f3n de correo electr\u00f3nico\\\", un atacante podr\u00eda enviar muchas solicitudes a una direcci\u00f3n conocida para provocar una denegaci\u00f3n de servicio (generaci\u00f3n de muchos correos electr\u00f3nicos, que tambi\u00e9n enviar\u00edan spam a la v\u00edctima).\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"n/a\",\"product\":\"n/a\",\"versions\":[{\"version\":\"n/a\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-08-28T15:19:58.637243Z\",\"id\":\"CVE-2023-50455\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:zammad:zammad:6.1.0:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"A246CC7D-8B52-43CC-A4F6-7E6C63D56740\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:zammad:zammad:6.1.0:alpha:*:*:*:*:*:*\",\"matchCriteriaId\":\"226C3449-B353-4B93-AC0E-F9D6367FC962\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:zammad:zammad:6.2.0:alpha:*:*:*:*:*:*\",\"matchCriteriaId\":\"98188727-1BBE-4691-8968-5E7047F19793\"}]}]}],\"references\":[{\"url\":\"https://zammad.com/en/advisories/zaa-2023-06\",\"source\":\"cve@mitre.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://zammad.com/en/advisories/zaa-2023-06\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-03-27T10:57:18+00:00",
      "cve": "CVE-2023-50455",
      "id": "CVE-2023-50455",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2023-50455",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-50455.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://zammad.com/en/advisories/zaa-2023-06\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T22:16:46.714Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-50455\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-08-28T15:19:58.637243Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-28T15:21:37.826Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"references\": [{\"url\": \"https://zammad.com/en/advisories/zaa-2023-06\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \\\"email address verification\\\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2023-12-10T18:49:13.949953\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-50455\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-28T15:21:46.918Z\", \"dateReserved\": \"2023-12-10T00:00:00\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2023-12-10T00:00:00\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.