Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-07-12 23:47

Modified

2026-07-13 00:08

Summary

Details

Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "nextcloud",
        "purl": "pkg:bitnami/nextcloud"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.5"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-22896"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.",
  "id": "BIT-nextcloud-2021-22896",
  "modified": "2026-07-13T00:08:34.851Z",
  "published": "2026-07-12T23:47:36.339Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nextcloud/mail/pull/4864"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nextcloud/mail/releases/tag/v1.9.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/1129996"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22896"
    }
  ],
  "schema_version": "1.6.2"
}

CVE-2021-22896 (GCVE-0-2021-22896)

Vulnerability from cvelistv5 – Published: 2021-06-11 15:49 – Updated: 2024-08-03 18:58

Summary

Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.

Severity

No CVSS data available.

CWE

CWE-862 - Missing Authorization (CWE-862)

Assigner

hackerone

References

4 references

URL	Tags
https://hackerone.com/reports/1129996	x_refsource_MISC
https://github.com/nextcloud/security-advisories/…	x_refsource_MISC
https://github.com/nextcloud/mail/pull/4864	x_refsource_MISC
https://github.com/nextcloud/mail/releases/tag/v1.9.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	Nextcloud Mail	Affected: Fixed in 1.9.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:58:25.923Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1129996"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/mail/pull/4864"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/mail/releases/tag/v1.9.5"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Nextcloud Mail",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in 1.9.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "Missing Authorization (CWE-862)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-06-11T15:49:38.000Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/1129996"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/mail/pull/4864"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/mail/releases/tag/v1.9.5"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "support@hackerone.com",
          "ID": "CVE-2021-22896",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Nextcloud Mail",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Fixed in 1.9.5"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Missing Authorization (CWE-862)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://hackerone.com/reports/1129996",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/1129996"
            },
            {
              "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3",
              "refsource": "MISC",
              "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3"
            },
            {
              "name": "https://github.com/nextcloud/mail/pull/4864",
              "refsource": "MISC",
              "url": "https://github.com/nextcloud/mail/pull/4864"
            },
            {
              "name": "https://github.com/nextcloud/mail/releases/tag/v1.9.5",
              "refsource": "MISC",
              "url": "https://github.com/nextcloud/mail/releases/tag/v1.9.5"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2021-22896",
    "datePublished": "2021-06-11T15:49:38.000Z",
    "dateReserved": "2021-01-06T00:00:00.000Z",
    "dateUpdated": "2024-08-03T18:58:25.923Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

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Vulnerability from bitnami_vulndb

CVE-2021-22896 (GCVE-0-2021-22896)

Tags

Sightings

Nomenclature