{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-73428", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-12T14:32:11.796Z", "datePublished": "2026-08-13T22:04:19.121Z", "dateUpdated": "2026-08-13T22:04:19.121Z"}, "containers": {"cna": {"title": "Trix: Stored XSS via HTMLParser attribute injection on paste", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/basecamp/trix/security/advisories/GHSA-53g2-mvcc-q9x3", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/basecamp/trix/security/advisories/GHSA-53g2-mvcc-q9x3"}, {"name": "https://github.com/basecamp/trix/pull/1293", "tags": ["x_refsource_MISC"], "url": "https://github.com/basecamp/trix/pull/1293"}, {"name": "https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c", "tags": ["x_refsource_MISC"], "url": "https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c"}, {"name": "https://github.com/basecamp/trix/releases/tag/v2.1.18", "tags": ["x_refsource_MISC"], "url": "https://github.com/basecamp/trix/releases/tag/v2.1.18"}], "affected": [{"vendor": "basecamp", "product": "trix", "versions": [{"version": "< 2.1.18", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-13T22:04:19.121Z"}, "descriptions": [{"lang": "en", "value": "Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Prior to 2.1.18, Trix is vulnerable to stored cross-site scripting when crafted HTML is pasted into the editor. HTMLParser processes a mock attachment in a `<span>` with an empty `data-trix-attachment=\"{}\"` value, causing data-trix-attributes to be applied to a plain string piece. StringPiece.fromJSON accepts an unvalidated href, allowing a javascript: URI to enter the document model and serialized HTML and execute when another user renders and clicks the content. Applications that apply server-side HTML sanitization can neutralize the payload on save. This issue is fixed in version 2.1.18."}], "source": {"advisory": "GHSA-53g2-mvcc-q9x3", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "trix", "vendor": "basecamp", "versions": [{"status": "affected", "version": "< 2.1.18"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Prior to 2.1.18, Trix is vulnerable to stored cross-site scripting when crafted HTML is pasted into the editor. HTMLParser processes a mock attachment in a `<span>` with an empty `data-trix-attachment=\"{}\"` value, causing data-trix-attributes to be applied to a plain string piece. StringPiece.fromJSON accepts an unvalidated href, allowing a javascript: URI to enter the document model and serialized HTML and execute when another user renders and clicks the content. Applications that apply server-side HTML sanitization can neutralize the payload on save. This issue is fixed in version 2.1.18."}], "id": "CVE-2026-73428", "lastModified": "2026-08-13T22:17:26.587", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-13T22:17:26.587", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c"}, {"source": "security-advisories@github.com", "url": "https://github.com/basecamp/trix/pull/1293"}, {"source": "security-advisories@github.com", "url": "https://github.com/basecamp/trix/releases/tag/v2.1.18"}, {"source": "security-advisories@github.com", "url": "https://github.com/basecamp/trix/security/advisories/GHSA-53g2-mvcc-q9x3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}