Security advisory

{
  "id": "fdc4f71e941d6547b25d8a78714340168fb8800edfbabc69b663509c28fed6e8",
  "url": "https://osv.dev/vulnerability/CVE-2021-31866",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-31866",
    "summary": "Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.",
    "evidence": "osv:CVE-2021-31866",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-31866",
      "aliases": [
        "BIT-redmine-2021-31866",
        "CVE-2021-31866"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/redmine/redmine",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ffaff01ccf0548c22f2e24486162988e4eda8575"
                },
                {
                  "introduced": "f5e62c8b125a09b2b66192125708d1aea492353c"
                },
                {
                  "fixed": "d1b7905ca9af8075542dad8c0fd671c6c82fd32f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:redmine:redmine:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.0.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:redmine:redmine:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.1.0"
                      },
                      {
                        "fixed": "4.1.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-31866.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:38.868221487Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2021/05/msg00013.html",
        "https://www.redmine.org/news/131",
        "https://www.redmine.org/projects/redmine/wiki/Security_Advisories"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-31866",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 434551,
  "published_at": "2021-04-28T07:15:07.663+00:00"
}