{"id":"CVE-2020-10101","aliases":["EUVD-2020-2566","GHSA-85q9-82qf-837m"],"status":"published","title":"An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in...","description":"An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in non-JSON format are sent by an attacker. The message format is not properly checked and parsing errors not handled. This leads to a crash of the service process.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01091,"percentile":0.65681,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-755"],"published":"2020-03-05T00:37:40Z","modified":"2026-10-24T10:30:27Z","products":[{"vendor":"zammad","product":"zammad"}],"references":[{"url":"https://zammad.com/news/security-advisory-zaa-2020-06","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-10101"},{"url":"https://github.com/advisories/GHSA-85q9-82qf-837m"}],"sources":{"cve":[{"id":"CVE-2020-10101","description":"An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in non-JSON format are sent by an attacker. The message format is not properly checked and parsing errors not handled. This leads to a crash of the service process.","status":"published","published":"2020-03-05T00:37:40Z","modified":"2024-08-04T10:50:57.889Z","updated_at":"2026-11-02T14:35:48.213211Z"}],"euvd":[{"id":"EUVD-2020-2566","description":"An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in non-JSON format are sent by an attacker. The message format is not properly checked and parsing errors not handled. This leads to a crash of the service process.","status":"published","published":"2020-03-05T00:37:40Z","modified":"2024-08-04T10:50:57Z","updated_at":"2026-11-03T03:07:51.449946Z"}],"ghsa":[{"id":"GHSA-85q9-82qf-837m","title":"An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in...","description":"An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in non-JSON format are sent by an attacker. The message format is not properly checked and parsing errors not handled. This leads to a crash of the service process.","status":"published","published":"2022-05-24T17:10:16Z","modified":"2023-01-29T05:01:36Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:44:52.185162Z"}],"nvd":[{"id":"CVE-2020-10101","description":"An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in non-JSON format are sent by an attacker. The message format is not properly checked and parsing errors not handled. This leads to a crash of the service process.","status":"published","published":"2020-03-05T01:15:11.367Z","modified":"2026-06-17T02:47:21.527Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20","CWE-755"],"updated_at":"2026-11-02T14:05:54.796125Z"}],"osv":[{"id":"CVE-2020-10101","description":"An issue was discovered in Zammad 3.0 through 3.2. The WebSocket server crashes when messages in non-JSON format are sent by an attacker. The message format is not properly checked and parsing errors not handled. This leads to a crash of the service process.","status":"published","published":"2020-03-05T01:15:11.367Z","modified":"2026-10-24T10:30:27.645168487Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:13.492058Z"}]}}