{"id":"CVE-2018-7544","aliases":["DEBIAN-CVE-2018-7544","EUVD-2018-19271","GHSA-9vqg-v7fx-9jvr","SUSE-SU-2021:14723-1","SUSE-SU-2021:1576-1","SUSE-SU-2021:1577-1","UBUNTU-CVE-2018-7544","openSUSE-SU-2021:0734-1","openSUSE-SU-2024:11692-1"],"status":"disputed","title":"** DISPUTED ** A cross-protocol scripting issue was discovered in the management interface in...","description":"A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning","severity":{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01785,"percentile":0.78455,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-134"],"published":"2018-03-16T15:00:00Z","modified":"2026-10-24T10:30:23Z","fixes":[{"ecosystem":"openSUSE:Tumbleweed","package":"openvpn","fixed_in":["2.5.4-2.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11-SECURITY","package":"openvpn-openssl1","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.2-0.10.9.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP5","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.8-16.26.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.8-16.26.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP2","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.3-5.7.1"}]}],"bundled":3},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP3","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.3-5.7.1"}]}],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2-4ubuntu1","2.3.2-5ubuntu1","2.3.2-7ubuntu1","2.3.2-7ubuntu2","2.3.2-7ubuntu3","2.3.2-7ubuntu3.1","2.3.2-7ubuntu3.2","2.3.2-7ubuntu3.2+esm1","2.3.2-7ubuntu3.2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.7-1ubuntu1","2.3.7-2ubuntu1","2.3.8-1ubuntu1","2.3.10-1ubuntu1","2.3.10-1ubuntu2","2.3.10-1ubuntu2.1","2.3.10-1ubuntu2.2","2.3.10-1ubuntu2.2+esm1","2.3.10-1ubuntu2.2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3-4ubuntu1","2.4.4-1ubuntu1","2.4.4-2ubuntu1","2.4.4-2ubuntu1.1","2.4.4-2ubuntu1.2","2.4.4-2ubuntu1.3","2.4.4-2ubuntu1.5","2.4.4-2ubuntu1.6","2.4.4-2ubuntu1.7","2.4.4-2ubuntu1.7+esm1"]},{"source":"osv","ecosystem":"openSUSE:Leap 15.2","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.3-lp152.6.3.1"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.4-2.1"}]}]}],"products":[{"vendor":"openvpn","product":"openvpn"}],"references":[{"url":"http://blog.0xlabs.com/2018/03/openvpn-remote-information-disclosure.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-7544"},{"url":"https://github.com/advisories/GHSA-9vqg-v7fx-9jvr"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-7544","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-202114723-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1085803","tags":["report"]},{"url":"https://bugzilla.suse.com/1185279","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-7544","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-15078","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20211576-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20211577-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1169925","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2020-11810","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2018-7544","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-7544","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/C5VK3H4AGK4ZRCLIB2D3IB7SS5RI4AZK/","tags":["advisory"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2018-7544","description":"A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning","status":"disputed","published":"2018-03-16T15:00:00Z","modified":"2024-11-14T20:46:28.947Z","updated_at":"2026-11-02T14:35:10.313768Z"}],"euvd":[{"id":"EUVD-2018-19271","description":"A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning","status":"published","published":"2018-03-16T15:00:00Z","modified":"2024-11-14T20:46:28Z","updated_at":"2026-11-03T00:04:59.953537Z"}],"ghsa":[{"id":"GHSA-9vqg-v7fx-9jvr","title":"** DISPUTED ** A cross-protocol scripting issue was discovered in the management interface in...","description":"** DISPUTED ** A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning.","status":"published","published":"2022-05-14T03:32:35Z","modified":"2023-02-02T05:08:03Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:52:39.182178Z"}],"nvd":[{"id":"CVE-2018-7544","description":"A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning","status":"disputed","published":"2018-03-16T15:29:00.247Z","modified":"2026-06-17T02:03:20.65Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:04:24.264003Z"}],"osv":[{"id":"CVE-2018-7544","description":"A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning","status":"published","published":"2018-03-16T15:29:00.247Z","modified":"2026-10-24T10:30:23.190199902Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:09.74357Z"},{"id":"DEBIAN-CVE-2018-7544","description":"A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning","status":"withdrawn","published":"2018-03-16T15:29:00.247Z","modified":"2025-12-08T01:49:35.810874Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:31.170944Z"},{"id":"UBUNTU-CVE-2018-7544","description":"A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning","status":"published","published":"2018-03-16T15:29:00Z","modified":"2025-09-08T16:44:47Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:18.772093Z"},{"id":"openSUSE-SU-2021:0734-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2020-15078: Fixed authentication bypass with deferred authentication (bsc#1185279).\n- CVE-2020-11810: Fixed race condition between allocating peer-id and initializing data channel key (bsc#1169925).\n- CVE-2018-7544: Fixed cross-protocol scripting issue that was discovered in the management interface (bsc#1085803).\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2021-05-15T16:04:52Z","modified":"2026-02-04T02:56:05.067112Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:11692-1","title":"openvpn-2.5.4-2.1 on GA media","description":"These are all security issues fixed in the openvpn-2.5.4-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:41:27.282609Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"SUSE-SU-2021:14723-1","title":"Security update for openvpn-openssl1","description":"This update for openvpn-openssl1 fixes the following issues:\n\n- CVE-2020-15078: Fixed authentication bypass with deferred authentication (bsc#1185279).\n- CVE-2018-7544: Fixed cross-protocol scripting issue that was discovered in the management interface (bsc#1085803).\n","status":"published","published":"2021-05-12T10:05:49Z","modified":"2026-02-04T04:19:47.893267Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2021:1576-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2020-15078: Fixed authentication bypass with deferred authentication (bsc#1185279).\n- CVE-2018-7544: Fixed cross-protocol scripting issue that was discovered in the management interface (bsc#1085803).\n","status":"published","published":"2021-05-12T10:06:05Z","modified":"2026-02-04T02:52:20.63132Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2021:1577-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2020-15078: Fixed authentication bypass with deferred authentication (bsc#1185279).\n- CVE-2020-11810: Fixed race condition between allocating peer-id and initializing data channel key (bsc#1169925).\n- CVE-2018-7544: Fixed cross-protocol scripting issue that was discovered in the management interface (bsc#1085803).\n","status":"published","published":"2021-05-12T10:07:01Z","modified":"2026-02-04T02:40:50.107091Z","updated_at":"2026-11-02T15:53:49.138643Z"}]}}