{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-71404", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-18T12:38:41.077Z", "datePublished": "2026-08-01T12:22:17.885Z", "dateUpdated": "2026-08-01T12:22:17.885Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-01T12:22:17.885Z"}, "datePublic": "2025-02-05T00:00:00.000Z", "title": "better-auth before 1.1.16 Reflected XSS via error parameter", "descriptions": [{"lang": "en", "value": "better-auth versions after v0.0.2 and before 1.1.16 contain a reflected cross-site scripting (XSS) vulnerability on the /api/auth/error page, where the value of the 'error' URL parameter is reflected as HTML without proper neutralization. An attacker who coerces a user into visiting a specially-crafted URL can execute arbitrary JavaScript in the context of the user's browser. The issue is fixed in version 1.1.16."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "cweId": "CWE-79", "type": "CWE"}]}], "affected": [{"vendor": "better-auth", "product": "better-auth", "defaultStatus": "unaffected", "packageURL": "pkg:npm/better-auth", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "1.1.16"}, {"version": "1.1.16", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:better-auth:better-auth\\/oauth-provider:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "1.1.16"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.1, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-9x4v-xfq5-m8x5", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-9x4v-xfq5-m8x5)"}, {"url": "https://github.com/better-auth/better-auth/commit/05ada0b79dbcac93cc04ceb79b23ca598d07830c", "tags": ["patch"], "name": "Patch Commit"}, {"name": "VulnCheck Advisory: better-auth before 1.1.16 Reflected XSS via error parameter", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/better-auth-before-reflected-xss-via-error-parameter"}], "credits": [{"lang": "en", "value": "Eriner", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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{"affected": [{"configurations": [{"platform": ["node.js"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "inferred"}, {"score": 99.0, "source": "matching"}]}, "product": "better-auth\\/oauth-provider", "vendor": "better-auth"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.1.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "1.1.16"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "better-auth", "source": "cna", "vendor": "better-auth"}, "product": "better_auth", "vendor": "better-auth"}], "created": "2026-08-01T14:15:03.467329+00:00", "updated": "2026-08-01T14:15:03.467353+00:00", "vendors": ["better-auth", "better-auth$PRODUCT$better-auth\\/oauth-provider", "better-auth$PRODUCT$better_auth"]}