{"id":"CVE-2026-116675","aliases":["EUVD-2026-111106","GHSA-mf2p-h6hf-fcwm","UBUNTU-CVE-2026-116675"],"status":"published","title":"TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization","description":"TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.","severity":{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00349,"percentile":0.28893,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-10-27T16:47:01Z","modified":"2026-10-30T02:30:26Z","fixes":[{"ecosystem":"npm","package":"tinymce","fixed_in":["8.9.3","7.9.4"],"sources":["ghsa","osv"]},{"ecosystem":"NuGet","package":"TinyMCE","fixed_in":["8.9.3","7.9.4"],"sources":["ghsa","osv"]},{"ecosystem":"Packagist","package":"tinymce/tinymce","fixed_in":["8.9.3","7.9.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"TinyMCE","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"tinymce/tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}]}]},{"source":"ghsa","ecosystem":"npm","package":"tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.9.3"},{"last_affected":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"]},{"source":"ghsa","ecosystem":"NuGet","package":"TinyMCE","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.9.3"},{"last_affected":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"]},{"source":"ghsa","ecosystem":"Packagist","package":"tinymce/tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.9.3"},{"last_affected":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"]},{"source":"osv","ecosystem":"npm","package":"tinymce","ranges":[{"type":"SEMVER","events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}]}]},{"source":"osv","ecosystem":"NuGet","package":"TinyMCE","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}]}],"versions":["8.5.1","8.6.0","8.7.0","8.8.0","8.8.1","8.8.2","8.9.0","8.9.1","8.9.2"]},{"source":"osv","ecosystem":"Packagist","package":"tinymce/tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}]}],"versions":["8.5.1","8.6.0","8.7.0","8.8.0","8.8.1","8.8.2","8.9.0","8.9.1","8.9.2"]},{"source":"osv","ecosystem":"npm","package":"tinymce","ranges":[{"type":"SEMVER","events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"]},{"source":"osv","ecosystem":"NuGet","package":"TinyMCE","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"]},{"source":"osv","ecosystem":"Packagist","package":"tinymce/tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.8+dfsg0-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.8+dfsg0-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"tinymce","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.8+dfsg0-2"]}],"products":[{"vendor":"tinymce","product":"tinymce"}],"references":[{"url":"https://github.com/tinymce/tinymce/security/advisories/GHSA-mf2p-h6hf-fcwm","tags":["x_refsource_CONFIRM","advisory","web","report"]},{"url":"https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2","tags":["x_refsource_MISC","fix","web","report"]},{"url":"https://github.com/tinymce/tinymce/releases/tag/8.9.3","tags":["x_refsource_MISC","web","report"]},{"url":"https://www.tiny.cloud/docs/tinymce/7/7.9.4-release-notes/#overview","tags":["x_refsource_MISC","web","report"]},{"url":"https://www.tiny.cloud/docs/tinymce/latest/8.9.3-release-notes/#overview","tags":["x_refsource_MISC","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116675","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-mf2p-h6hf-fcwm"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116675.json","tags":["advisory"]},{"url":"https://github.com/tinymce/tinymce","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2026-116675","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-116675","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-116675","title":"TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization","description":"TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.","status":"published","published":"2026-10-27T16:47:01.183Z","modified":"2026-10-28T16:15:12.999Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:03.827373Z"}],"euvd":[{"id":"EUVD-2026-111106","description":"TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.","status":"published","published":"2026-10-27T16:47:01Z","modified":"2026-10-28T16:15:12Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:59:20.41252Z"}],"ghsa":[{"id":"GHSA-mf2p-h6hf-fcwm","title":"TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization","description":"### Impact\nStored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first.\n\n### Workarounds\nNo official workaround available.\n\n### Fix\nTo avoid this vulnerability:\n\nUpgrade to TinyMCE 8.9.3 or higher.\nUpgrade to TinyMCE 7.9.4 or higher.\n\n### Acknowledgements\nTiny thanks [Fariskhi Vidyan](https://github.com/farisv) and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.","status":"published","published":"2026-10-27T21:07:12Z","modified":"2026-10-27T21:07:13Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:41:38.969831Z"}],"nvd":[{"id":"CVE-2026-116675","description":"TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.","status":"published","published":"2026-10-27T17:16:59.617Z","modified":"2026-10-28T17:18:01.76Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:13:04.037468Z"}],"osv":[{"id":"CVE-2026-116675","title":"TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization","description":"TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.","status":"published","published":"2026-10-27T16:47:01.183Z","modified":"2026-10-30T02:30:26.330282718Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:56.675758Z"},{"id":"GHSA-mf2p-h6hf-fcwm","title":"TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization","description":"### Impact\nStored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first.\n\n### Workarounds\nNo official workaround available.\n\n### Fix\nTo avoid this vulnerability:\n\nUpgrade to TinyMCE 8.9.3 or higher.\nUpgrade to TinyMCE 7.9.4 or higher.\n\n### Acknowledgements\nTiny thanks [Fariskhi Vidyan](https://github.com/farisv) and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.","status":"published","published":"2026-10-27T21:07:12Z","modified":"2026-10-27T21:15:04.912450737Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:51.811331Z"},{"id":"UBUNTU-CVE-2026-116675","description":"TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.","status":"published","published":"2026-10-27T17:16:00Z","modified":"2026-10-28T20:17:45.741916901Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:56:00.081948Z"}]}}