{"id":"CVE-2023-46252","aliases":["EUVD-2023-50481","GHSA-7q4f-fprr-5jw8"],"status":"published","title":"Cross-Site Scripting (XSS) via postMessage Handler in Squidex","description":"Squidex is an open source headless CMS and content management hub. Affected versions are missing origin verification in a postMessage handler which introduces a Cross-Site Scripting (XSS) vulnerability. The editor-sdk.js file defines three different class-like functions, which employ a global message event listener: SquidexSidebar, SquidexWidget, and SquidexFormField. The registered event listener takes some action based on the type of the received message. For example, when the SquidexFormField receives a message with the type valueChanged, the value property is updated. The SquidexFormField class is for example used in the editor-editorjs.html file, which can be accessed via the public wwwroot folder. It uses the onValueChanged method to register a callback function, which passes the value provided from the message event to the editor.render. Passing an attacker-controlled value to this function introduces a Cross-Site Scripting (XSS) vulnerability.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00565,"percentile":0.47223,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2023-11-07T19:00:58Z","modified":"2026-10-28T02:31:09Z","products":[{"vendor":"squidex","product":"squidex"},{"vendor":"squidex.io","product":"squidex"}],"references":[{"url":"https://github.com/Squidex/squidex/security/advisories/GHSA-7q4f-fprr-5jw8","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Vendor Advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/46xxx/CVE-2023-46252.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-46252","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-46252","title":"Cross-Site Scripting (XSS) via postMessage Handler in Squidex","description":"Squidex is an open source headless CMS and content management hub. Affected versions are missing origin verification in a postMessage handler which introduces a Cross-Site Scripting (XSS) vulnerability. The editor-sdk.js file defines three different class-like functions, which employ a global message event listener: SquidexSidebar, SquidexWidget, and SquidexFormField. The registered event listener takes some action based on the type of the received message. For example, when the SquidexFormField receives a message with the type valueChanged, the value property is updated. The SquidexFormField class is for example used in the editor-editorjs.html file, which can be accessed via the public wwwroot folder. It uses the onValueChanged method to register a callback function, which passes the value provided from the message event to the editor.render. Passing an attacker-controlled value to this function introduces a Cross-Site Scripting (XSS) vulnerability.","status":"published","published":"2023-11-07T19:00:58.743Z","modified":"2024-09-04T15:22:43.945Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:35:23.309349Z"}],"euvd":[{"id":"EUVD-2023-50481","description":"Squidex is an open source headless CMS and content management hub. Affected versions are missing origin verification in a postMessage handler which introduces a Cross-Site Scripting (XSS) vulnerability. The editor-sdk.js file defines three different class-like functions, which employ a global message event listener: SquidexSidebar, SquidexWidget, and SquidexFormField. The registered event listener takes some action based on the type of the received message. For example, when the SquidexFormField receives a message with the type valueChanged, the value property is updated. The SquidexFormField class is for example used in the editor-editorjs.html file, which can be accessed via the public wwwroot folder. It uses the onValueChanged method to register a callback function, which passes the value provided from the message event to the editor.render. Passing an attacker-controlled value to this function introduces a Cross-Site Scripting (XSS) vulnerability.","status":"published","published":"2023-11-07T19:00:58Z","modified":"2024-09-04T15:22:43Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T00:56:04.589959Z"}],"nvd":[{"id":"CVE-2023-46252","description":"Squidex is an open source headless CMS and content management hub. Affected versions are missing origin verification in a postMessage handler which introduces a Cross-Site Scripting (XSS) vulnerability. The editor-sdk.js file defines three different class-like functions, which employ a global message event listener: SquidexSidebar, SquidexWidget, and SquidexFormField. The registered event listener takes some action based on the type of the received message. For example, when the SquidexFormField receives a message with the type valueChanged, the value property is updated. The SquidexFormField class is for example used in the editor-editorjs.html file, which can be accessed via the public wwwroot folder. It uses the onValueChanged method to register a callback function, which passes the value provided from the message event to the editor.render. Passing an attacker-controlled value to this function introduces a Cross-Site Scripting (XSS) vulnerability.","status":"published","published":"2023-11-07T19:15:11.573Z","modified":"2026-06-17T06:30:31.457Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:08:43.669554Z"}],"osv":[{"id":"CVE-2023-46252","title":"Cross-Site Scripting (XSS) via postMessage Handler in Squidex","description":"Squidex is an open source headless CMS and content management hub. Affected versions are missing origin verification in a postMessage handler which introduces a Cross-Site Scripting (XSS) vulnerability. The editor-sdk.js file defines three different class-like functions, which employ a global message event listener: SquidexSidebar, SquidexWidget, and SquidexFormField. The registered event listener takes some action based on the type of the received message. For example, when the SquidexFormField receives a message with the type valueChanged, the value property is updated. The SquidexFormField class is for example used in the editor-editorjs.html file, which can be accessed via the public wwwroot folder. It uses the onValueChanged method to register a callback function, which passes the value provided from the message event to the editor.render. Passing an attacker-controlled value to this function introduces a Cross-Site Scripting (XSS) vulnerability.","status":"published","published":"2023-11-07T19:00:58.743Z","modified":"2026-10-28T02:31:09.844015532Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:34.287121Z"}]}}