CVE-2026-18644
Full vulnerability record from the local CVENow database.
Description
A vulnerability was identified in danpros HTMLy up to 3.1.1. Affected by this issue is the function unlink of the file /system/htmly.php of the component Delete Username Endpoint. Such manipulation of the argument File leads to path traversal. The attack can be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
LOW
CVSS score
2.1
(v4.0)
Vulnerability status
Deferred
Source identifier
Published
2026-08-03 20:17:17.210000
Last modified
2026-10-23 21:10:00.157000
View original CVE JSON
{
"id": "CVE-2026-18644",
"sourceIdentifier": "[email protected]",
"published": "2026-08-03T20:17:17.210",
"lastModified": "2026-10-23T21:10:00.157",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was identified in danpros HTMLy up to 3.1.1. Affected by this issue is the function unlink of the file /system/htmly.php of the component Delete Username Endpoint. Such manipulation of the argument File leads to path traversal. The attack can be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way."
},
{
"lang": "es",
"value": "Una vulnerabilidad fue identificada en danpros HTMLy hasta 3.1.1. Afectada por este problema es la función unlink del archivo /system/htmly.php del componente Delete Username Endpoint. Dicha manipulación del argumento File conduce a salto de ruta. El ataque puede ser lanzado remotamente. El exploit está disponible públicamente y podría ser usado. El proveedor fue contactado tempranamente sobre esta divulgación pero no respondió de ninguna manera."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "danpros",
"product": "HTMLy",
"cpes": [
"cpe:2.3:a:htmly:htmly:*:*:*:*:*:*:*:*"
],
"modules": [
"Delete Username Endpoint"
],
"versions": [
{
"version": "3.1.0",
"status": "affected"
},
{
"version": "3.1.1",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV40": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "4.0",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"baseScore": 2.1,
"baseSeverity": "LOW",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"vulnAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "PROOF_OF_CONCEPT",
"confidentialityRequirement": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"availabilityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED"
}
}
],
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"availabilityImpact": "LOW"
},
"exploitabilityScore": 2.8,
"impactScore": 2.5
}
],
"cvssMetricV2": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "2.0",
"vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
"baseScore": 5.5,
"accessVector": "NETWORK",
"accessComplexity": "LOW",
"authentication": "SINGLE",
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"availabilityImpact": "PARTIAL"
},
"baseSeverity": "MEDIUM",
"exploitabilityScore": 8.0,
"impactScore": 4.9,
"acInsufInfo": false,
"obtainAllPrivilege": false,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-03T20:28:43.382443Z",
"id": "CVE-2026-18644",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-22"
}
]
}
],
"references": [
{
"url": "https://github.com/orionyan520/cve_report/issues/5",
"source": "[email protected]"
},
{
"url": "https://vuldb.com/cve/CVE-2026-18644",
"source": "[email protected]"
},
{
"url": "https://vuldb.com/submit/854991",
"source": "[email protected]"
},
{
"url": "https://vuldb.com/vuln/385563",
"source": "[email protected]"
},
{
"url": "https://vuldb.com/vuln/385563/cti",
"source": "[email protected]"
},
{
"url": "https://vuldb.com/submit/854991",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
]
}