{"id":"CVE-2026-11366","aliases":["EUVD-2026-52582","GHSA-9984-4442-697f"],"status":"published","title":"MonsterInsights \u003c 11.1.0 - Unauthenticated Measurement Protocol Secret Update via Empty-Key HMAC Bypass","description":"The MonsterInsights  WordPress plugin before 11.1.0 does not correctly validate the signature on one of its unauthenticated AJAX actions: when the MonsterInsights  WordPress plugin before 11.1.0 is not connected to Google Analytics the HMAC signing key is empty, which lets unauthenticated attackers forge a valid signature and overwrite a MonsterInsights  WordPress plugin before 11.1.0 configuration value, disrupting the MonsterInsights  WordPress plugin before 11.1.0's server-side analytics in Manual GA4 mode.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-08","score":0.00249,"percentile":0.16297,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2026-08-04T06:00:09Z","modified":"2026-08-26T16:31:16Z","products":[{"vendor":"unknown","product":"monsterinsights"}],"references":[{"url":"https://wpscan.com/vulnerability/283331ca-cc2e-4c2c-9e3b-2e8c6f0c84d2/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11366"},{"url":"https://wpscan.com/vulnerability/283331ca-cc2e-4c2c-9e3b-2e8c6f0c84d2"},{"url":"https://github.com/advisories/GHSA-9984-4442-697f"}],"sources":{"cve":[{"id":"CVE-2026-11366","title":"MonsterInsights \u003c 11.1.0 - Unauthenticated Measurement Protocol Secret Update via Empty-Key HMAC Bypass","description":"The MonsterInsights  WordPress plugin before 11.1.0 does not correctly validate the signature on one of its unauthenticated AJAX actions: when the MonsterInsights  WordPress plugin before 11.1.0 is not connected to Google Analytics the HMAC signing key is empty, which lets unauthenticated attackers forge a valid signature and overwrite a MonsterInsights  WordPress plugin before 11.1.0 configuration value, disrupting the MonsterInsights  WordPress plugin before 11.1.0's server-side analytics in Manual GA4 mode.","status":"published","published":"2026-08-04T06:00:09.331Z","modified":"2026-08-04T14:33:12.162Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"adp"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:20:05.15083Z"}],"euvd":[{"id":"EUVD-2026-52582","description":"The MonsterInsights  WordPress plugin before 11.1.0 does not correctly validate the signature on one of its unauthenticated AJAX actions: when the MonsterInsights  WordPress plugin before 11.1.0 is not connected to Google Analytics the HMAC signing key is empty, which lets unauthenticated attackers forge a valid signature and overwrite a MonsterInsights  WordPress plugin before 11.1.0 configuration value, disrupting the MonsterInsights  WordPress plugin before 11.1.0's server-side analytics in Manual GA4 mode.","status":"published","published":"2026-08-04T06:00:09Z","modified":"2026-08-04T14:33:12Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T18:02:23.332335Z"}],"ghsa":[{"id":"GHSA-9984-4442-697f","title":"The MonsterInsights  WordPress plugin before 11.1.0 does not correctly validate the signature on...","description":"The MonsterInsights  WordPress plugin before 11.1.0 does not correctly validate the signature on one of its unauthenticated AJAX actions: when the MonsterInsights  WordPress plugin before 11.1.0 is not connected to Google Analytics the HMAC signing key is empty, which lets unauthenticated attackers forge a valid signature and overwrite a MonsterInsights  WordPress plugin before 11.1.0 configuration value, disrupting the MonsterInsights  WordPress plugin before 11.1.0's server-side analytics in Manual GA4 mode.","status":"published","published":"2026-08-04T09:31:34Z","modified":"2026-08-04T15:32:21Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:10:04.647546Z"}],"nvd":[{"id":"CVE-2026-11366","description":"The MonsterInsights  WordPress plugin before 11.1.0 does not correctly validate the signature on one of its unauthenticated AJAX actions: when the MonsterInsights  WordPress plugin before 11.1.0 is not connected to Google Analytics the HMAC signing key is empty, which lets unauthenticated attackers forge a valid signature and overwrite a MonsterInsights  WordPress plugin before 11.1.0 configuration value, disrupting the MonsterInsights  WordPress plugin before 11.1.0's server-side analytics in Manual GA4 mode.","status":"published","published":"2026-08-04T07:16:28.37Z","modified":"2026-08-26T16:31:16.753Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:12:34.643497Z"}]}}