CVE-2024-4439
WordPress Core is vulnerable to Stored Cross-Site Scripting via user display names in the Avatar block in various versions up to 6.5.2 due to insufficient output escaping on the display name. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. In addition, it also makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that have the comment block present and display the comment author's avatar.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Base score: 6.1
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 71%
- Percentile among all scored CVEs: 99
- Score date: 10/6/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
💥 Public exploits
Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.
- Nuclei template (automated mass detection) · WordPress Core <6.5.2 - Cross-Site Scripting
- Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub
⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.
Affected technologies (1)
CWEs
- CWE-80
References
- https://core.trac.wordpress.org/changeset/57951/branches/6.4/src/wp-includes/blocks/avatar.php
- https://core.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=57950%40%2F&new=57950%40%2F&sfp_email=&sfph_mail=#file3
- https://wordpress.org/news/2024/04/wordpress-6-5-2-maintenance-and-security-release/
- https://www.wordfence.com/blog/2024/04/unauthenticated-stored-cross-site-scripting-vulnerability-patched-in-wordpress-core/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/e363c09a-4381-4b3a-951c-9a0ff5669016?source=cve
- https://core.trac.wordpress.org/changeset/57951/branches/6.4/src/wp-includes/blocks/avatar.php
- https://core.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=57950%40%2F&new=57950%40%2F&sfp_email=&sfph_mail=#file3
- https://wordpress.org/news/2024/04/wordpress-6-5-2-maintenance-and-security-release/
- https://www.wordfence.com/blog/2024/04/unauthenticated-stored-cross-site-scripting-vulnerability-patched-in-wordpress-core/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/e363c09a-4381-4b3a-951c-9a0ff5669016?source=cve
Raw JSON (NVD)
Show
{
"id": "CVE-2024-4439",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-4439",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2024-05-09T19:37:57.427844Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security@wordfence.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 7.2,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "LOW"
},
"impactScore": 2.7,
"exploitabilityScore": 3.9
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 6.1,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "LOW"
},
"impactScore": 2.7,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "security@wordfence.com",
"affectedData": [
{
"vendor": "WordPress Foundation",
"product": "WordPress",
"versions": [
{
"status": "affected",
"version": "6.0",
"versionType": "semver",
"lessThanOrEqual": "6.0.7"
},
{
"status": "affected",
"version": "6.1",
"versionType": "semver",
"lessThanOrEqual": "6.1.5"
},
{
"status": "affected",
"version": "6.2",
"versionType": "semver",
"lessThanOrEqual": "6.2.4"
},
{
"status": "affected",
"version": "6.3",
"versionType": "semver",
"lessThanOrEqual": "6.3.3"
},
{
"status": "affected",
"version": "6.4",
"versionType": "semver",
"lessThanOrEqual": "6.4.3"
},
{
"status": "affected",
"version": "6.5",
"versionType": "semver",
"lessThanOrEqual": "6.5.1"
}
],
"defaultStatus": "unaffected"
}
]
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"affectedData": [
{
"cpes": [
"cpe:2.3:a:wordpress:wordpress:6.0:*:*:*:*:*:*:*"
],
"vendor": "wordpress",
"product": "wordpress",
"versions": [
{
"status": "affected",
"version": "6.0",
"versionType": "custom",
"lessThanOrEqual": "6.5.1"
}
],
"defaultStatus": "unknown"
}
]
}
],
"published": "2024-05-03T06:15:14.947",
"references": [
{
"url": "https://core.trac.wordpress.org/changeset/57951/branches/6.4/src/wp-includes/blocks/avatar.php",
"tags": [
"Patch"
],
"source": "security@wordfence.com"
},
{
"url": "https://core.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=57950%40%2F&new=57950%40%2F&sfp_email=&sfph_mail=#file3",
"tags": [
"Patch"
],
"source": "security@wordfence.com"
},
{
"url": "https://wordpress.org/news/2024/04/wordpress-6-5-2-maintenance-and-security-release/",
"tags": [
"Vendor Advisory"
],
"source": "security@wordfence.com"
},
{
"url": "https://www.wordfence.com/blog/2024/04/unauthenticated-stored-cross-site-scripting-vulnerability-patched-in-wordpress-core/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "security@wordfence.com"
},
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/e363c09a-4381-4b3a-951c-9a0ff5669016?source=cve",
"tags": [
"Third Party Advisory"
],
"source": "security@wordfence.com"
},
{
"url": "https://core.trac.wordpress.org/changeset/57951/branches/6.4/src/wp-includes/blocks/avatar.php",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://core.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=57950%40%2F&new=57950%40%2F&sfp_email=&sfph_mail=#file3",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://wordpress.org/news/2024/04/wordpress-6-5-2-maintenance-and-security-release/",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.wordfence.com/blog/2024/04/unauthenticated-stored-cross-site-scripting-vulnerability-patched-in-wordpress-core/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/e363c09a-4381-4b3a-951c-9a0ff5669016?source=cve",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-80"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "WordPress Core is vulnerable to Stored Cross-Site Scripting via user display names in the Avatar block in various versions up to 6.5.2 due to insufficient output escaping on the display name. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. In addition, it also makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that have the comment block present and display the comment author's avatar."
},
{
"lang": "es",
"value": "WordPress Core es vulnerable a Cross-Site Scripting Almacenado a través de nombres para mostrar de usuario en el bloque Avatar en varias versiones hasta 6.5.2 debido a una salida insuficiente que se escapa en el nombre para mostrar. Esto hace posible que atacantes autenticados, con acceso de nivel de colaborador y superior, inyecten scripts web arbitrarios en páginas que se ejecutarán cada vez que un usuario acceda a una página inyectada. Además, también hace posible que atacantes no autenticados inyecten scripts web arbitrarios en páginas que tienen el bloque de comentarios presente y muestran el avatar del autor del comentario."
}
],
"lastModified": "2026-06-17T08:01:53.037",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6742B863-A9F5-467B-85D8-C75C18614252",
"versionEndIncluding": "6.0.7",
"versionStartIncluding": "6.0"
},
{
"criteria": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "501FF79E-083A-4B24-8E57-F0C188FAB4AE",
"versionEndIncluding": "6.1.5",
"versionStartIncluding": "6.1"
},
{
"criteria": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A46440E9-304F-45FD-A64C-5999AD108344",
"versionEndIncluding": "6.2.4",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "248E3821-B5A6-4670-872B-8E98617CC71B",
"versionEndIncluding": "6.3.3",
"versionStartIncluding": "6.3"
},
{
"criteria": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "40B5EA04-95EA-4668-932F-C4DAE2D0C7ED",
"versionEndIncluding": "6.4.3",
"versionStartIncluding": "6.4.0"
},
{
"criteria": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2E49E358-13CD-415A-A9CE-11455B36B886",
"versionEndIncluding": "6.5.1",
"versionStartIncluding": "6.5"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security@wordfence.com"
}