nexkey allows arbitrary users to impersonate any remote user due to missing signature validation

{
  "id": "fd324f673824644804929dff1531e3937056e49b401022d8f29f92ca5da31285",
  "url": "https://osv.dev/vulnerability/CVE-2023-49095",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nexkey allows arbitrary users to impersonate any remote user due to missing signature validation",
    "summary": "nexkey is a microblogging platform. Insufficient validation of ActivityPub requests received in inbox could allow any user to impersonate another user in certain circumstances. This issue has been patched in version 12.122.2.",
    "evidence": "osv:CVE-2023-49095",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-49095",
      "aliases": [
        "CVE-2023-49095",
        "GHSA-fpxw-rw9v-2gmx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nexryai/concorde",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b96da0eac5a1e75abba94cf926f1251842829bab"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "b96da0eac5a1e75abba94cf926f1251842829bab"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "12.119.2-fix.5.5",
            "12.119.2-fix.5.4",
            "12.119.2-fix.5.3",
            "12.119.2-fix.5.2",
            "12.119.2-fix.5.1",
            "12.119.2-fix.5",
            "12.119.2-fix.4",
            "12.119.2-fix.3",
            "12.119.2-fix.2",
            "12.119.2-fix.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-49095.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.300497134Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49095.json",
        "https://github.com/nexryai/nexkey/security/advisories/GHSA-fpxw-rw9v-2gmx",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-49095",
        "https://github.com/nexryai/nexkey/commit/b96da0eac5a1e75abba94cf926f1251842829bab"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "12.122.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "12.122.2"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49095.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-49095",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503270,
  "published_at": "2023-11-30T07:10:10.994+00:00"
}