{"id":"GHSA-f5ww-cq3m-q3g7","summary":"Sanitize vulnerable to Cross-site Scripting via insufficient neutralization of `style` element content","details":"### Impact\n\nUsing carefully crafted input, an attacker may be able to sneak arbitrary HTML and CSS through Sanitize `\u003e= 3.0.0, \u003c 6.0.2` when Sanitize is configured to use the built-in \"relaxed\" config or when using a custom config that allows `style` elements and one or more CSS at-rules. This could result in XSS (cross-site scripting) or other undesired behavior when the malicious HTML and CSS are rendered in a browser.\n\n### Patches\n\nSanitize `\u003e= 6.0.2` performs additional escaping of CSS in `style` element content, which fixes this issue.\n\n### Workarounds\n\nUsers who are unable to upgrade can prevent this issue by using a Sanitize config that doesn't allow `style` elements, using a Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence `\u003c/` as `\u003c\\/` in `style` element content.\n\n### Credit\n\nThis issue was found by @cure53 during an audit of a project that uses Sanitize and was reported by one of that project's maintainers. Thank you!","aliases":["CVE-2023-36823"],"modified":"2023-11-14T18:46:47.726856Z","published":"2023-07-06T19:45:44Z","database_specific":{"github_reviewed_at":"2023-07-06T19:45:44Z","nvd_published_at":"2023-07-06T16:15:10Z","cwe_ids":["CWE-79"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/rgrove/sanitize/security/advisories/GHSA-f5ww-cq3m-q3g7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36823"},{"type":"WEB","url":"https://github.com/rgrove/sanitize/commit/76ed46e6dc70820f38efe27de8dabd54dddb5220"},{"type":"PACKAGE","url":"https://github.com/rgrove/sanitize"},{"type":"WEB","url":"https://github.com/rgrove/sanitize/releases/tag/v6.0.2"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sanitize/CVE-2023-36823.yml"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/11/msg00008.html"}],"affected":[{"package":{"name":"sanitize","ecosystem":"RubyGems","purl":"pkg:gem/sanitize"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"6.0.2"}]}],"versions":["3.0.0","3.0.1","3.0.2","3.0.3","3.0.4","3.1.0","3.1.1","3.1.2","4.0.0","4.0.1","4.1.0","4.2.0","4.3.0","4.4.0","4.5.0","4.6.0","4.6.1","4.6.2","4.6.3","4.6.4","4.6.5","4.6.6","5.0.0","5.1.0","5.2.0","5.2.1","5.2.2","5.2.3","6.0.0","6.0.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/07/GHSA-f5ww-cq3m-q3g7/GHSA-f5ww-cq3m-q3g7.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L"}]}