{"id":"CVE-2019-11185","aliases":["EUVD-2019-2889","GHSA-wfph-5jh4-c99x"],"status":"published","title":"The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file...","description":"The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending \"magic bytes\" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remote_upload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.04349,"percentile":0.91303,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2019-06-03T20:34:53Z","modified":"2026-06-17T02:12:29Z","products":[{"vendor":"3cx","product":"live_chat"}],"references":[{"url":"https://wordpress.org/plugins/wp-live-chat-support/#developers","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://wp-livechat.com/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://wpvulndb.com/vulnerabilities/9320","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-11185"},{"url":"https://github.com/advisories/GHSA-wfph-5jh4-c99x"}],"sources":{"cve":[{"id":"CVE-2019-11185","description":"The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending \"magic bytes\" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remote_upload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.","status":"published","published":"2019-06-03T20:34:53Z","modified":"2024-08-04T22:48:08.128Z","updated_at":"2026-11-02T14:20:26.416173Z"}],"euvd":[{"id":"EUVD-2019-2889","description":"The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending \"magic bytes\" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remote_upload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.","status":"published","published":"2019-06-03T20:34:53Z","modified":"2024-08-04T22:48:08Z","updated_at":"2026-11-03T02:40:49.794129Z"}],"ghsa":[{"id":"GHSA-wfph-5jh4-c99x","title":"The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file...","description":"The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending \"magic bytes\" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remote_upload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.","status":"published","published":"2022-05-24T16:46:59Z","modified":"2023-06-04T05:00:43Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:54:37.773458Z"}],"nvd":[{"id":"CVE-2019-11185","description":"The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending \"magic bytes\" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remote_upload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.","status":"published","published":"2019-06-03T21:29:00.49Z","modified":"2026-06-17T02:12:29.99Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:05:14.729983Z"}]}}