{"id":"GHSA-mf2p-h6hf-fcwm","summary":"TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization","details":"### 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.","aliases":["CVE-2026-116675"],"modified":"2026-10-27T21:15:04.912450737Z","published":"2026-10-27T21:07:12Z","database_specific":{"cwe_ids":["CWE-79"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-10-27T21:07:12Z","nvd_published_at":"2026-10-27T17:16:59Z"},"references":[{"type":"WEB","url":"https://github.com/tinymce/tinymce/security/advisories/GHSA-mf2p-h6hf-fcwm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116675"},{"type":"WEB","url":"https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2"},{"type":"PACKAGE","url":"https://github.com/tinymce/tinymce"},{"type":"WEB","url":"https://github.com/tinymce/tinymce/releases/tag/8.9.3"},{"type":"WEB","url":"https://www.tiny.cloud/docs/tinymce/7/7.9.4-release-notes/#overview"},{"type":"WEB","url":"https://www.tiny.cloud/docs/tinymce/latest/8.9.3-release-notes/#overview"}],"affected":[{"package":{"name":"tinymce","ecosystem":"npm","purl":"pkg:npm/tinymce"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.5.1"},{"fixed":"8.9.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"}},{"package":{"name":"TinyMCE","ecosystem":"NuGet","purl":"pkg:nuget/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"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"}},{"package":{"name":"tinymce/tinymce","ecosystem":"Packagist","purl":"pkg:composer/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"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"}},{"package":{"name":"tinymce","ecosystem":"npm","purl":"pkg:npm/tinymce"},"ranges":[{"type":"SEMVER","events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"}},{"package":{"name":"TinyMCE","ecosystem":"NuGet","purl":"pkg:nuget/TinyMCE"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"}},{"package":{"name":"tinymce/tinymce","ecosystem":"Packagist","purl":"pkg:composer/tinymce/tinymce"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.9.3"},{"fixed":"7.9.4"}]}],"versions":["7.9.3"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"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"}]}