Exploitation evidence
Known exploited · CISA KEV listed
Added 2024-12-03. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA due date: 2024-12-24. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
North Grid Corporation / Proself Enterprise/Standard Edition
Default status: Not specified
- affected: Ver5.62 and earlier
North Grid Corporation / Proself Gateway Edition
Default status: Not specified
- affected: Ver1.65 and earlier
North Grid Corporation / Proself Mail Sanitize Edition
Default status: Not specified
- affected: Ver1.08 and earlier
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.04822,
"percentile": 0.92102
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.04822,
"percentile": 0.92052
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.04822,
"percentile": 0.92042
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.04822,
"percentile": 0.92038
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.04822,
"percentile": 0.92032
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.04822,
"percentile": 0.92019
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.04822,
"percentile": 0.92011
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.04822,
"percentile": 0.92005
}04 Nov 2026, 18:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T20:29:32.421Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://www.proself.jp/information/153/"
},
{
"tags": [
"x_transferred"
],
"url": "https://jvn.jp/en/jp/JVN95981460/"
}
],
"title": "CVE Program Container"
},
{
"affected": [
{
"cpes": [
"cpe:2.3:a:northgrid:proself:-:*:*:*:enterprise:*:*:*"
],
"defaultStatus": "unknown",
"product": "proself",
"vendor": "northgrid",
"versions": [
{
"lessThanOrEqual": "5.62",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:northgrid:proself:-:*:*:*:gateway:*:*:*"
],
"defaultStatus": "unknown",
"product": "proself",
"vendor": "northgrid",
"versions": [
{
"lessThanOrEqual": "1.65",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:northgrid:proself:-:*:*:*:standard:*:*:*"
],
"defaultStatus": "unknown",
"product": "proself",
"vendor": "northgrid",
"versions": [
{
"lessThanOrEqual": "5.62",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:northgrid:proself:-:*:*:*:mail_sanitize:*:*:*"
],
"defaultStatus": "unknown",
"product": "proself",
"vendor": "northgrid",
"versions": [
{
"lessThanOrEqual": "1.08",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-45727",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-12-06T04:55:30.434626Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2024-12-03",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-45727"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-611",
"description": "CWE-611 Improper Restriction of XML External Entity Reference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T23:05:34.245Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-45727"
}
],
"timeline": [
{
"lang": "en",
"time": "2024-12-03T00:00:00.000Z",
"value": "CVE-2023-45727 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Proself Enterprise/Standard Edition",
"vendor": "North Grid Corporation",
"versions": [
{
"status": "affected",
"version": "Ver5.62 and earlier"
}
]
},
{
"product": "Proself Gateway Edition",
"vendor": "North Grid Corporation",
"versions": [
{
"status": "affected",
"version": "Ver1.65 and earlier"
}
]
},
{
"product": "Proself Mail Sanitize Edition",
"vendor": "North Grid Corporation",
"versions": [
{
"status": "affected",
"version": "Ver1.08 and earlier"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Proself Enterprise/Standard Edition Ver5.62 and earlier, Proself Gateway Edition Ver1.65 and earlier, and Proself Mail Sanitize Edition Ver1.08 and earlier allow a remote unauthenticated attacker to conduct XML External Entity (XXE) attacks. By processing a specially crafted request containing malformed XML data, arbitrary files on the server containing account information may be read by the attacker."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "XML external entities (XXE)",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-10-18T09:01:12.285Z",
"orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
"shortName": "jpcert"
},
"references": [
{
"url": "https://www.proself.jp/information/153/"
},
{
"url": "https://jvn.jp/en/jp/JVN95981460/"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
"assignerShortName": "jpcert",
"cveId": "CVE-2023-45727",
"datePublished": "2023-10-18T09:01:12.285Z",
"dateReserved": "2023-10-11T07:32:42.029Z",
"dateUpdated": "2025-10-21T23:05:34.245Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.04822,
"percentile": 0.9199
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.04822,
"percentile": 0.91979
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2023-45727",
"cwes": [
"CWE-611"
],
"dateAdded": "2024-12-03",
"dueDate": "2024-12-24",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://www.proself.jp/information/153/ ; https://nvd.nist.gov/vuln/detail/CVE-2023-45727",
"product": "Proself",
"requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "North Grid Proself Enterprise/Standard, Gateway, and Mail Sanitize contain an improper restriction of XML External Entity (XXE) reference vulnerability, which could allow a remote, unauthenticated attacker to conduct an XXE attack.",
"vendorProject": "North Grid",
"vulnerabilityName": "North Grid Proself Improper Restriction of XML External Entity (XXE) Reference Vulnerability"
}