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vuln-cve/data/2026/39xxx/CVE-2026-39923.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-39923",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2026-04-07T20:57:06.210Z",
"datePublished": "2026-08-05T14:38:35.604Z",
"dateUpdated": "2026-11-08T14:02:36.336Z"
},
"containers": {
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"shortName": "VulnCheck",
"dateUpdated": "2026-11-08T14:02:36.336Z"
},
"datePublic": "2026-04-11T00:00:00.000Z",
"title": "Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset",
"descriptions": [
{
"lang": "en",
"value": "Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated attackers to reuse expired password reset tokens by submitting them directly to the reset processing endpoint. The SavePasswordController::handle() method calls PasswordToken::findOrFail() without performing any expiry validation, allowing attackers to bypass the 24-hour token lifetime enforced only during form rendering and change any account's password to gain an authenticated session."
}
],
"tags": [
"x_open-source"
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-324",
"description": "Use of a Key Past its Expiration Date",
"type": "CWE"
}
]
}
],
"affected": [
{
"defaultStatus": "affected",
"vendor": "Flarum",
"product": "Flarum Framework",
"packageURL": "pkg:github/flarum/framework",
"repo": "https://github.com/flarum/framework",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThan": "1.8.16"
}
]
}
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"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
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"vulnerable": true,
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}
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}
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"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
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"baseScore": 9.2,
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"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
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],
"references": [
{
"url": "https://github.com/flarum/framework/releases/tag/v1.8.16",
"name": "Flarum Framework 1.8.16 Release Notes",
"tags": [
"release-notes"
]
},
{
"url": "https://github.com/flarum/framework/pull/4545",
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},
{
"url": "https://github.com/flarum/framework/commit/2803058d0f9dc38252326070b46d4484fe5a857d",
"name": "Patch Commit",
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"patch"
]
},
{
"url": "https://www.vulncheck.com/advisories/flarum-password-reset-token-expiry-bypass-via-post-reset",
"tags": [
"third-party-advisory"
]
}
],
"credits": [
{
"lang": "en",
"value": "Hamed Kohi",
"type": "finder"
},
{
"lang": "en",
"value": "VulnCheck",
"type": "coordinator"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "vulncheck"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-05T19:35:44.335747Z",
"id": "CVE-2026-39923",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
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"shortName": "CISA-ADP",
"dateUpdated": "2026-08-05T19:48:08.090Z"
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}
}