Vulnerability-Lookup

FKIE_CVE-2021-4073

Vulnerability from fkie_nvd - Published: 2021-12-14 16:15 - Updated: 2026-06-17 04:18

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

The RegistrationMagic WordPress plugin made it possible for unauthenticated users to log in as any site user, including administrators, if they knew a valid username on the site due to missing identity validation in the social login function social_login_using_email() of the plugin. This affects versions equal to, and less than, 5.0.1.7.

References

URL	Tags
security@wordfence.com	https://plugins.trac.wordpress.org/changeset/2635173/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_user_services.php	Patch, Third Party Advisory
security@wordfence.com	https://www.wordfence.com/blog/2021/12/authentication-bypass-vulnerability-patched-in-user-registration-plugin/	Exploit, Third Party Advisory
security@wordfence.com	https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4073	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://plugins.trac.wordpress.org/changeset/2635173/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_user_services.php	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.wordfence.com/blog/2021/12/authentication-bypass-vulnerability-patched-in-user-registration-plugin/	Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4073	Third Party Advisory

Impacted products

	Vendor	Product	Version
	metagauss	registrationmagic	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "RegistrationMagic",
          "vendor": "RegistrationMagic",
          "versions": [
            {
              "lessThanOrEqual": "5.0.1.7",
              "status": "affected",
              "version": "5.0.1.7",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:metagauss:registrationmagic:*:*:*:*:*:wordpress:*:*",
              "matchCriteriaId": "5494E62C-3443-4A67-B3C4-DC0FFC3978B3",
              "versionEndIncluding": "5.0.1.7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The RegistrationMagic WordPress plugin made it possible for unauthenticated users to log in as any site user, including administrators, if they knew a valid username on the site due to missing identity validation in the social login function social_login_using_email() of the plugin. This affects versions equal to, and less than, 5.0.1.7."
    },
    {
      "lang": "es",
      "value": "El plugin RegistrationMagic de WordPress permit\u00eda a usuarios no autenticados iniciar sesi\u00f3n como cualquier usuario del sitio, incluidos los administradores, si conoc\u00edan un nombre de usuario v\u00e1lido en el sitio debido a una falta de comprobaci\u00f3n de la identidad en la funci\u00f3n login social social_login_using_email() del plugin. Esto afecta a las versiones iguales y menores a 5.0.1.7"
    }
  ],
  "id": "CVE-2021-4073",
  "lastModified": "2026-06-17T04:18:59.610",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "security@wordfence.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-4073",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-02-14T17:48:40.517668Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-12-14T16:15:09.833",
  "references": [
    {
      "source": "security@wordfence.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://plugins.trac.wordpress.org/changeset/2635173/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_user_services.php"
    },
    {
      "source": "security@wordfence.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://www.wordfence.com/blog/2021/12/authentication-bypass-vulnerability-patched-in-user-registration-plugin/"
    },
    {
      "source": "security@wordfence.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4073"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://plugins.trac.wordpress.org/changeset/2635173/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_user_services.php"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://www.wordfence.com/blog/2021/12/authentication-bypass-vulnerability-patched-in-user-registration-plugin/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4073"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}

CVE-2021-4073 (GCVE-0-2021-4073)

Vulnerability from cvelistv5 – Published: 2021-12-14 15:50 – Updated: 2025-02-14 17:48

Title

RegistrationMagic <= 5.0.1.7 Authentication Bypass

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-14 17:48 UTC

CWE

CWE-287 - Improper Authentication

Assigner

Wordfence mitre root

References

3 references

URL	Tags
https://www.wordfence.com/vulnerability-advisorie…	x_refsource_MISC
https://plugins.trac.wordpress.org/changeset/2635…	x_refsource_MISC
https://www.wordfence.com/blog/2021/12/authentica…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
RegistrationMagic	RegistrationMagic	Affected: 5.0.1.7 , ≤ 5.0.1.7 (custom)

Date Public

2021-12-08 00:00

Credits

Chloe Chamberland, Wordfence Marco Wotschka, Wordfence AyeCode Ltd

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:16:03.759Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4073"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://plugins.trac.wordpress.org/changeset/2635173/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_user_services.php"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.wordfence.com/blog/2021/12/authentication-bypass-vulnerability-patched-in-user-registration-plugin/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-4073",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-14T17:48:40.517668Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-14T17:48:49.176Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "RegistrationMagic",
          "vendor": "RegistrationMagic",
          "versions": [
            {
              "lessThanOrEqual": "5.0.1.7",
              "status": "affected",
              "version": "5.0.1.7",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Chloe Chamberland, Wordfence"
        },
        {
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          "value": "Marco Wotschka, Wordfence"
        },
        {
          "lang": "en",
          "value": "AyeCode Ltd"
        }
      ],
      "datePublic": "2021-12-08T00:00:00.000Z",
      "descriptions": [
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        }
      ],
      "metrics": [
        {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
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      "providerMetadata": {
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        },
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          "url": "https://plugins.trac.wordpress.org/changeset/2635173/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_user_services.php"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.wordfence.com/blog/2021/12/authentication-bypass-vulnerability-patched-in-user-registration-plugin/"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update to version 5.0.1.8, or newer."
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "RegistrationMagic \u003c= 5.0.1.7 Authentication Bypass",
      "x_generator": {
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      },
      "x_legacyV4Record": {
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          "ID": "CVE-2021-4073",
          "STATE": "PUBLIC",
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        "affects": {
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        "references": {
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    "datePublished": "2021-12-14T15:50:15.519Z",
    "dateReserved": "2021-12-06T00:00:00.000Z",
    "dateUpdated": "2025-02-14T17:48:49.176Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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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.

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FKIE_CVE-2021-4073

CVE-2021-4073 (GCVE-0-2021-4073)

Tags

Sightings

Nomenclature

Related by attack behaviour