{"id":"CVE-2022-23518","aliases":["GHSA-mcvf-2q2m-x72m"],"url":"https://o3.security/vulnerability/CVE-2022-23518","summary":"Improper neutralization of data URIs allows XSS in rails-html-sanitizer","details":"## Summary\n\nrails-html-sanitizer `>= 1.0.3, < 1.4.4` is vulnerable to cross-site scripting via data URIs when used in combination with Loofah `>= 2.1.0`.\n\n\n## Mitigation\n\nUpgrade to rails-html-sanitizer `>= 1.4.4`.\n\n\n## Severity\n\nThe maintainers have evaluated this as [Medium Severity 6.1](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).\n\n\n## References\n\n- [CWE - CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (4.9)](https://cwe.mitre.org/data/definitions/79.html)\n- [SVG MIME Type (image/svg+xml) is misleading to developers · Issue #266 · w3c/svgwg](https://github.com/w3c/svgwg/issues/266)\n- https://github.com/rails/rails-html-sanitizer/issues/135\n- https://hackerone.com/reports/1694173\n\n\n## Credit\n\nThis vulnerability was independently reported by Maciej Piechota (@haqpl) and Mrinmoy Das (@goromlagche).","published":"2022-12-14T16:22:34.460Z","modified":"2026-08-12T03:51:39.398496525Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.00867,"percentile":0.55539,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"RubyGems","name":"rails-html-sanitizer","fixedVersion":"1.4.4"}],"fix":null,"references":[{"type":"WEB","url":"https://hackerone.com/reports/1694173"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/09/msg00012.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00045.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23518.json"},{"type":"ADVISORY","url":"https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-mcvf-2q2m-x72m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23518"},{"type":"REPORT","url":"https://github.com/rails/rails-html-sanitizer/issues/135"},{"type":"WEB","url":"https://github.com/w3c/svgwg/issues/266"},{"type":"PACKAGE","url":"https://github.com/rails/rails-html-sanitizer"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rails-html-sanitizer/CVE-2022-23518.yml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:39.398496525Z"}}