{"id":"CVE-2026-116675","aliases":["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.","severity":"high","score":8.5,"published":"2026-10-27T16:47:01.183Z","modified":"2026-10-27T21:15:04.912Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"npm","name":"tinymce","ranges":[{"events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}],"type":"SEMVER"}],"versions":[],"fixed":["8.9.3"]},{"ecosystem":"NuGet","name":"TinyMCE","ranges":[{"events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}],"type":"ECOSYSTEM"}],"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"],"fixed":["8.9.3"]},{"ecosystem":"Packagist","name":"tinymce/tinymce","ranges":[{"events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}],"type":"ECOSYSTEM"}],"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"],"fixed":["8.9.3"]},{"ecosystem":"npm","name":"tinymce","ranges":[{"events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}],"type":"SEMVER"}],"versions":["7.9.3"],"fixed":["7.9.4"]},{"ecosystem":"NuGet","name":"TinyMCE","ranges":[{"events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}],"type":"ECOSYSTEM"}],"versions":["7.9.3"],"fixed":["7.9.4"]},{"ecosystem":"Packagist","name":"tinymce/tinymce","ranges":[{"events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}],"type":"ECOSYSTEM"}],"versions":["7.9.3"],"fixed":["7.9.4"]}],"sourceAffected":[],"references":["https://github.com/tinymce/tinymce/security/advisories/GHSA-mf2p-h6hf-fcwm","https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2","https://github.com/tinymce/tinymce/releases/tag/8.9.3","https://www.tiny.cloud/docs/tinymce/7/7.9.4-release-notes/#overview","https://www.tiny.cloud/docs/tinymce/latest/8.9.3-release-notes/#overview","https://nvd.nist.gov/vuln/detail/CVE-2026-116675","https://github.com/tinymce/tinymce"],"sources":[{"name":"CVE","id":"CVE-2026-116675","modified":"2026-10-27T16:47:01.183Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-116675"},{"name":"OSV","id":"GHSA-mf2p-h6hf-fcwm","modified":"2026-10-27T21:15:04.912450737Z","url":"https://osv.dev/vulnerability/GHSA-mf2p-h6hf-fcwm"}],"assessments":[{"source":"CNA","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","score":8.5},{"source":"OSV","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","score":8.5}]}