« Back to list

CVE-2022-39356

Status: ModifiedHigh (8.8)—

Discourse is a platform for community discussion. Users who receive an invitation link that is not scoped to a single email address can enter any non-admin user's email and gain access to their account when accepting the invitation. All users should upgrade to the latest version. A workaround is temporarily disabling invitations with `SiteSetting.max_invites_per_day = 0` or scope them to individual email addresses.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Discourse — Discourse

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2022-39356",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-39356",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-23T15:47:11.705998Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.9,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 2.3
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "discourse",
          "product": "discourse",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.8.9"
            },
            {
              "status": "affected",
              "version": "<= 2.9.0.beta10"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-11-02T17:15:17.520",
  "references": [
    {
      "url": "https://github.com/discourse/discourse/pull/18817",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/discourse/discourse/security/advisories/GHSA-x8w7-rwmr-w278",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/discourse/discourse/pull/18817",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/discourse/discourse/security/advisories/GHSA-x8w7-rwmr-w278",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Discourse is a platform for community discussion. Users who receive an invitation link that is not scoped to a single email address can enter any non-admin user's email and gain access to their account when accepting the invitation. All users should upgrade to the latest version. A workaround is temporarily disabling invitations with `SiteSetting.max_invites_per_day = 0` or scope them to individual email addresses."
    },
    {
      "lang": "es",
      "value": "Discourse es una plataforma para la discusión comunitaria. Los usuarios que reciben un enlace de invitación que no está dirigido a una única dirección de correo electrónico pueden ingresar el correo electrónico de cualquier usuario que no sea administrador y obtener acceso a su cuenta al aceptar la invitación. Todos los usuarios deben actualizar a la última versión. Un workaround alternativo es deshabilitar temporalmente las invitaciones con `SiteSetting.max_invites_per_day = 0` o limitarlas a direcciones de correo electrónico individuales."
    }
  ],
  "lastModified": "2026-06-17T04:58:12.400",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6B12D112-6E19-48E4-92C4-0719F6719929",
              "versionEndExcluding": "2.8.10"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B3803EF9-A296-42B7-887F-93C5E68E94C4"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta10:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "35BAC488-3622-4B0B-B8EA-879E8C68E8CF"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8BA3D313-3C11-43E2-A47D-CBB532D1B6F8"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6F42673E-65F3-4807-9484-20CB747420FB"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0B91D023-FCE5-4866-AD8B-BBB675763104"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0086484D-0164-449C-8AAE-BE7479CB9706"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F9D1B031-96C7-44C0-A0A0-F67ABE55C93C"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "750D2AD9-35E7-4AC7-9C22-AA90DAA34F3F"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta8:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B68E308A-BDAB-4614-A563-4460F7996CBE"
            },
            {
              "criteria": "cpe:2.3:a:discourse:discourse:2.9.0:beta9:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5DEDE4C5-2C2A-4B74-BB41-8AAA0EE636E2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}