CVE-2023-52425 (GCVE-0-2023-52425)
Vulnerability from cvelistv5 – Published: 2024-02-04 00:00 – Updated: 2025-11-04 18:21
VLAI
EPSS
VEX
Summary
libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-26 19:20 UTC
CWE
- n/a
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
8 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| libexpat_project | libexpat |
Affected:
0 , ≤ 2.5.0
(custom)
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2025-11-04T18:21:45.774Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://github.com/libexpat/libexpat/pull/789"
},
{
"name": "FEDORA-2024-fbe1f0c1aa",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/"
},
{
"name": "FEDORA-2024-b8656bc059",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/"
},
{
"name": "[debian-lts-announce] 20240409 [SECURITY] [DLA 3783-1] expat security update",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html"
},
{
"name": "[oss-security] 20240320 Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 \u0026 CVE-2024-0450)",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/03/20/5"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20240614-0003/"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/"
}
],
"title": "CVE Program Container"
},
{
"affected": [
{
"cpes": [
"cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "libexpat",
"vendor": "libexpat_project",
"versions": [
{
"lessThanOrEqual": "2.5.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-52425",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-08-26T19:20:56.852251Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400 Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-08-26T19:22:48.969Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-06-14T13:06:11.482Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://github.com/libexpat/libexpat/pull/789"
},
{
"name": "FEDORA-2024-fbe1f0c1aa",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/"
},
{
"name": "FEDORA-2024-b8656bc059",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/"
},
{
"name": "[debian-lts-announce] 20240409 [SECURITY] [DLA 3783-1] expat security update",
"tags": [
"mailing-list"
],
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html"
},
{
"name": "[oss-security] 20240320 Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 \u0026 CVE-2024-0450)",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2024/03/20/5"
},
{
"url": "https://security.netapp.com/advisory/ntap-20240614-0003/"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2023-52425",
"datePublished": "2024-02-04T00:00:00.000Z",
"dateReserved": "2024-02-04T00:00:00.000Z",
"dateUpdated": "2025-11-04T18:21:45.774Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2023-52425",
"date": "2026-09-14",
"epss": "0.01815",
"percentile": "0.77463"
},
"microsoft_vex": {
"current_release_date": "2026-02-18T14:23:00.000Z",
"cve": "CVE-2023-52425",
"id": "msrc_CVE-2023-52425",
"initial_release_date": "2024-02-02T08:00:00.000Z",
"product_status:fixed": "5",
"product_status:known_affected": "5",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.",
"url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2023-52425.json",
"version": "3"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2023-52425\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2024-02-04T20:15:46.063\",\"lastModified\":\"2026-06-17T06:42:39.490\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.\"},{\"lang\":\"es\",\"value\":\"libexpat hasta 2.5.0 permite una denegaci\u00f3n de servicio (consumo de recursos) porque se requieren muchos an\u00e1lisis completos en el caso de un token grande para el cual se necesitan m\u00faltiples rellenos de b\u00fafer.\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"n/a\",\"product\":\"n/a\",\"versions\":[{\"version\":\"n/a\",\"status\":\"affected\"}]}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"affectedData\":[{\"vendor\":\"libexpat_project\",\"product\":\"libexpat\",\"defaultStatus\":\"unknown\",\"cpes\":[\"cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*\"],\"versions\":[{\"version\":\"0\",\"lessThanOrEqual\":\"2.5.0\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-08-26T19:20:56.852251Z\",\"id\":\"CVE-2023-52425\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.5.0\",\"matchCriteriaId\":\"1C50909D-8A18-484B-A7DB-7EF4CA67C2CB\"}]}]}],\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2024/03/20/5\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/libexpat/libexpat/pull/789\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20240614-0003/\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/03/20/5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/libexpat/libexpat/pull/789\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20240614-0003/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-04T06:28:18+00:00",
"cve": "CVE-2023-52425",
"id": "CVE-2023-52425",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:fixed": "223",
"product_status:known_affected": "29",
"product_status:known_not_affected": "47",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "expat: parsing large tokens can trigger a denial of service",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52425.json",
"version": "3"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://github.com/libexpat/libexpat/pull/789\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/\", \"name\": \"FEDORA-2024-fbe1f0c1aa\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/\", \"name\": \"FEDORA-2024-b8656bc059\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html\", \"name\": \"[debian-lts-announce] 20240409 [SECURITY] [DLA 3783-1] expat security update\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/03/20/5\", \"name\": \"[oss-security] 20240320 Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 \u0026 CVE-2024-0450)\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240614-0003/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-04T18:21:45.774Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52425\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-08-26T19:20:56.852251Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*\"], \"vendor\": \"libexpat_project\", \"product\": \"libexpat\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"2.5.0\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400 Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-26T19:21:24.937Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"references\": [{\"url\": \"https://github.com/libexpat/libexpat/pull/789\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/\", \"name\": \"FEDORA-2024-fbe1f0c1aa\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/\", \"name\": \"FEDORA-2024-b8656bc059\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html\", \"name\": \"[debian-lts-announce] 20240409 [SECURITY] [DLA 3783-1] expat security update\", \"tags\": [\"mailing-list\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/03/20/5\", \"name\": \"[oss-security] 20240320 Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 \u0026 CVE-2024-0450)\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240614-0003/\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2024-06-14T13:06:11.482Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-52425\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T18:21:45.774Z\", \"dateReserved\": \"2024-02-04T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2024-02-04T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Loading…
Loading…