Search

Find a vulnerability

Search criteria

    1 vulnerability by ProcessOne

    CVE-2026-104733 (GCVE-0-2026-104733)

    Vulnerability from cvelistv5 – Published: 2026-10-02 12:19 – Updated: 2026-10-02 16:57
    VLAI
    Title
    User Impersonation/Authorization Bypass in XMPP Server ejabberd
    Summary
    User Impersonation in ProcessOnes XMMP Server ejabberd <= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-02 16:56 UTC
    CWE
    • User Impersonation
    • CWE-290 - Authentication Bypass by Spoofing
    References
    Impacted products
    Vendor Product Version
    ProcessOne ejabberd Affected: 0 , ≤ 26.04 (custom)
    Create a notification for this product.
    Date Public
    2026-07-31 09:01
    Show details on NVD website

    {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-104733",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-10-02T16:56:58.717189Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-290",
                    "description": "CWE-290 Authentication Bypass by Spoofing",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-10-02T16:57:18.308Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "platforms": [
                "MacOS",
                "Linux"
              ],
              "product": "ejabberd",
              "repo": "https://github.com/processone/ejabberd",
              "vendor": "ProcessOne",
              "versions": [
                {
                  "changes": [
                    {
                      "at": "26.07",
                      "status": "unaffected"
                    }
                  ],
                  "lessThanOrEqual": "26.04",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Marius Schwarz (NSIDE ATTACK LOGIC GmbH)"
            }
          ],
          "datePublic": "2026-07-31T09:01:00.000Z",
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "User Impersonation in ProcessOnes XMMP Server ejabberd \u0026lt;= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism."
                }
              ],
              "value": "User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism."
            }
          ],
          "impacts": [
            {
              "descriptions": [
                {
                  "lang": "en",
                  "value": "Authorization Bypass"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 7.4,
                "baseSeverity": "HIGH",
                "exploitMaturity": "PROOF_OF_CONCEPT",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "HIGH",
                "subConfidentialityImpact": "HIGH",
                "subIntegrityImpact": "HIGH",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "User Impersonation",
                  "lang": "en"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-02T12:19:10.635Z",
            "orgId": "455daabc-a392-441d-aa46-37d35189897c",
            "shortName": "NCSC.ch"
          },
          "references": [
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004/"
            },
            {
              "tags": [
                "release-notes"
              ],
              "url": "https://github.com/processone/ejabberd/releases#release-26.07"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Update to the latest version of ejabberd (26.07)"
                }
              ],
              "value": "Update to the latest version of ejabberd (26.07)"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "User Impersonation/Authorization Bypass in XMPP Server ejabberd",
          "workarounds": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Disable the SALS-PLAIN authentication mechanism"
                }
              ],
              "value": "Disable the SALS-PLAIN authentication mechanism"
            }
          ],
          "x_generator": {
            "engine": "Vulnogram 1.0.2"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c",
        "assignerShortName": "NCSC.ch",
        "cveId": "CVE-2026-104733",
        "datePublished": "2026-10-02T12:19:10.635Z",
        "dateReserved": "2026-10-02T11:49:34.103Z",
        "dateUpdated": "2026-10-02T16:57:18.308Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }