{"id":"CVE-2025-64501","summary":"ProsemirrorToHtml: Cross-Site Scripting vulnerability through unescaped HTML attribute values","details":"ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML. In versions 0.2.0 and below, the `prosemirror_to_html` gem is vulnerable to Cross-Site Scripting (XSS) attacks through malicious HTML attribute values. While tag content is properly escaped, attribute values are not, allowing attackers to inject arbitrary JavaScript code. Applications that use `prosemirror_to_html` to convert ProseMirror documents to HTML, user-generated ProseMirror content, and end users viewing the rendered HTML output are all at risk of attack. This issue is fixed in version 0.2.1.","aliases":["GHSA-52c5-vh7f-26fx"],"modified":"2026-08-12T03:51:49.480619099Z","published":"2025-11-10T21:37:01.010Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64501.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-79"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64501.json"},{"type":"ADVISORY","url":"https://github.com/etaminstudio/prosemirror_to_html/security/advisories/GHSA-52c5-vh7f-26fx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-64501"},{"type":"FIX","url":"https://github.com/etaminstudio/prosemirror_to_html/commit/4d59f94f550bcabeec30d298791bbdd883298ad8"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/etaminstudio/prosemirror_to_html","events":[{"introduced":"0"},{"fixed":"4d59f94f550bcabeec30d298791bbdd883298ad8"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"0.2.1"}]}}],"versions":["v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-64501.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N"}]}