{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc1:*:*:*:*:*:*",
              "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc2:*:*:*:*:*:*",
              "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc3:*:*:*:*:*:*",
              "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc4:*:*:*:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.0.5"
              },
              {
                "introduced": "4.1.0"
              },
              {
                "fixed": "4.1.1"
              },
              {
                "introduced": "4.2.0-rc1"
              },
              {
                "last_affected": "4.2.0-rc1"
              },
              {
                "introduced": "4.2.0-rc2"
              },
              {
                "last_affected": "4.2.0-rc2"
              },
              {
                "introduced": "4.2.0-rc3"
              },
              {
                "last_affected": "4.2.0-rc3"
              },
              {
                "introduced": "4.2.0-rc4"
              },
              {
                "last_affected": "4.2.0-rc4"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ff513427371cd84e07b19c0586d419dbed976b31"
            },
            {
              "introduced": "0033e3e37b12cb5d951d21492500d66a6abc472b"
            },
            {
              "fixed": "5549c9149e80537d0f431b6b3ebf638c35568c4f"
            },
            {
              "introduced": "f968c56890bd84295672ee0d46cc846cac2dbd47"
            },
            {
              "last_affected": "a5ce36d0882ae1b4b409a7b68233bf89591a5f95"
            }
          ],
          "repo": "https://github.com/mattermost/mattermost",
          "type": "GIT"
        }
      ],
      "versions": [
        "4.2.0-rc1",
        "4.2.0-rc2",
        "4.2.0-rc3",
        "4.2.0-rc4"
      ]
    }
  ],
  "database_specific": {
    "unresolved_ranges": [
      {
        "cpes": [
          "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc1:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "4.2.0-rc1"
          },
          {
            "last_affected": "4.2.0-rc1"
          }
        ],
        "source": "CPE_STRING",
        "vendor_product": "mattermost:mattermost_server"
      }
    ]
  },
  "details": "An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It mishandles IP-based rate limiting.",
  "id": "CVE-2017-18899",
  "modified": "2026-07-08T05:38:43.804010158Z",
  "published": "2020-06-19T19:15:11.437Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://mattermost.com/security-updates/"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}