{"id":"CVE-2023-54423","aliases":["GHSA-9j5w-2cqc-cwj9"],"url":"https://o3.security/vulnerability/CVE-2023-54423","summary":"OpenMage magento-lts before 20.2.0 Stored XSS via TinyMCE WYSIWYG Editor","details":"From HackerOne report [#1948040](https://hackerone.com/reports/1948040) by Halit AKAYDIN (hltakydn)\n\n### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nThe TinyMCE WYSIWYG editor fails to filter scripts when rendering the HTML in specially crafted HTML tags.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nThis vulnerability was fixed in version 20.2.0 by upgrading TinyMCE to a recent version in https://github.com/OpenMage/magento-lts/pull/3220\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nThe WYSIWYG editor features could be disabled in the configuration. Possibly some WAF appliances would filter this attack.\n\n### References\n_Are there any links users can visit to find out more?_\n\nThe attack is simply an exploit of the \"onmouseover\" attribute of an `img` element as described on [OWASP XSS Filter Evasion](https://cheatsheetseries.owasp.org/cheatsheets/XSS_Filter_Evasion_Cheat_Sheet.html)","published":"2026-11-13T09:37:04.518Z","modified":"2026-11-14T02:45:20.473676598Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Packagist","name":"openmage/magento-lts","fixedVersion":"20.2.0"}],"fix":{"url":"https://github.com/OpenMage/magento-lts/pull/3220","label":"OpenMage/magento-lts#3220"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54423.json"},{"type":"ADVISORY","url":"https://github.com/OpenMage/magento-lts/security/advisories/GHSA-9j5w-2cqc-cwj9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54423"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.2.0-stored-xss-via-tinymce-wysiwyg-editor"},{"type":"WEB","url":"https://github.com/OpenMage/magento-lts/pull/3220"},{"type":"WEB","url":"https://hackerone.com/reports/1948040"},{"type":"PACKAGE","url":"https://github.com/OpenMage/magento-lts"},{"type":"WEB","url":"https://github.com/OpenMage/magento-lts/releases/tag/v20.2.0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-14T02:45:20.473676598Z"}}