Security advisory

{
  "id": "71f3392433601b824e7be2569ed43ee91ea319720fbd28f4bbcce8a4c2dad8cc",
  "url": "https://osv.dev/vulnerability/CVE-2021-21247",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-21247",
    "summary": "OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, the application's BasePage registers an AJAX event listener (`AbstractPostAjaxBehavior`) in all pages other than the login page. This listener decodes and deserializes the `data` query parameter. We can access this listener by submitting a POST request to any page. This issue may lead to `post-auth RCE` This endpoint is subject to authentication and, therefore, requires a valid user to carry on the attack. This issue was addressed in 4.0.3 by encrypting serialization payload with secrets only known to server.",
    "evidence": "osv:CVE-2021-21247",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-21247",
      "aliases": [
        "CVE-2021-21247",
        "GHSA-6pxf-75cf-vwjp"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/theonedev/onedev",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4bd71941974a1b077e955616d7ba3da6fd21670c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.0.2",
            "v4.0.1",
            "v4.0.0",
            "v3.2.4",
            "v3.2.3",
            "v3.2.2",
            "v3.2.1",
            "v3.2.0",
            "v3.1.2",
            "v3.1.1",
            "v3.1.0",
            "v3.0.10",
            "v3.0.9",
            "v3.0.8",
            "v3.0.7",
            "v3.0.6",
            "v3.0.5",
            "v3.0.4",
            "2.0.5",
            "2.0.4",
            "2.0.0",
            "2.0-beta-build120",
            "2.0-beta-build119"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21247.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:30.142600473Z",
      "provider": "osv",
      "references": [
        "https://github.com/theonedev/onedev/security/advisories/GHSA-6pxf-75cf-vwjp"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-21247",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385459,
  "published_at": "2021-01-15T21:15:13.583+00:00"
}