{"id":"CVE-2025-47946","aliases":["GHSA-5j3w-5pcr-f8hg"],"url":"https://o3.security/vulnerability/CVE-2025-47946","summary":"symfony/ux-live-component and symfony/ux-twig-component vulnerable to unsanitized HTML attribute injection via ComponentAttributes","details":"### Impact\n\nRendering `{{ attributes }}` or using any method that returns a `ComponentAttributes` instance (e.g. `only()`, `defaults()`, `without()`) ouputs attribute values directly without escaping. If these values are unsafe (e.g. contain user input), this can lead to HTML attribute injection and XSS vulnerabilities.\n\n### Patches\n\nThe issue is fixed in version `2.25.1` of `symfony/ux-twig-component` by using Twig's `EscaperRuntime` to properly escape HTML attributes in `ComponentAttributes`.  If you use `symfony/ux-live-component`, you must also update it to `2.25.1` to benefit from the fix, as it reuses the `ComponentAttributes` class internally.\n\n### Workarounds\n\nUntil you can upgrade, avoid rendering `{{ attributes }}` or derived objects directly if it may contain untrusted values.\nInstead, use `{{ attributes.render('name') }}` for safe output of individual attributes.\n\n### References\n\nGitHub repository: [symfony/ux](https://github.com/symfony/ux)","published":"2025-05-19T19:25:19.350Z","modified":"2026-08-12T03:51:34.954970511Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"symfony/ux-twig-component","fixedVersion":"2.25.1"},{"ecosystem":"Packagist","name":"symfony/ux-live-component","fixedVersion":"2.25.1"}],"fix":{"url":"https://github.com/symfony/ux/commit/b5d1c85995c128cb926d47a96cfbfbd500b643a8","label":"symfony/ux@b5d1c85"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47946.json"},{"type":"ADVISORY","url":"https://github.com/symfony/ux/security/advisories/GHSA-5j3w-5pcr-f8hg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-47946"},{"type":"FIX","url":"https://github.com/symfony/ux/commit/b5d1c85995c128cb926d47a96cfbfbd500b643a8"},{"type":"WEB","url":"https://github.com/symfony/ux-live-component/commit/7ad44cf56d750b9f56658ed986286a10da132ee7"},{"type":"WEB","url":"https://github.com/symfony/ux-twig-component/commit/b5d4e77db69315aeb18d2238e0e7c943d340ce76"},{"type":"WEB","url":"https://github.com/symfony/ux/commit/c2f7738ee0969c31df7514025a7f5fc6e153932d"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/ux-live-component/CVE-2025-47946.yaml"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/ux-twig-component/CVE-2025-47946.yaml"},{"type":"PACKAGE","url":"https://github.com/symfony/ux"},{"type":"WEB","url":"https://symfony.com/blog/symfony-ux-cve-2025-47946-unsanitized-html-attribute-injection-via-componentattributes"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:34.954970511Z"}}