CVE-2021-21973 (GCVE-0-2021-21973)
Vulnerability from cvelistv5 – Published: 2021-02-24 16:42 – Updated: 2025-10-21 23:25
VLAI?
Summary
The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).
Severity ?
5.3 (Medium)
CWE
- SSRF vulnerability
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | VMware vCenter Server |
Affected:
7.x before 7.0 U1c
Affected: 6.7 before 6.7 U3l Affected: 6.5 before 6.5 U3n |
|||||||
|
|||||||||
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T18:30:23.450Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://www.vmware.com/security/advisories/VMSA-2021-0002.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2021-21973",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-02-16T16:16:46.429372Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2022-03-07",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21973"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"description": "CWE-918 Server-Side Request Forgery (SSRF)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T23:25:54.167Z",
"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-2021-21973"
}
],
"timeline": [
{
"lang": "en",
"time": "2022-03-07T00:00:00.000Z",
"value": "CVE-2021-21973 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "VMware vCenter Server",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "7.x before 7.0 U1c"
},
{
"status": "affected",
"version": "6.7 before 6.7 U3l"
},
{
"status": "affected",
"version": "6.5 before 6.5 U3n"
}
]
},
{
"product": "VMware Cloud Foundation",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "4.x before 4.2"
},
{
"status": "affected",
"version": "3.x before 3.10.1.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2)."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "SSRF vulnerability",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-02-24T16:42:02.000Z",
"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
"shortName": "vmware"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.vmware.com/security/advisories/VMSA-2021-0002.html"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@vmware.com",
"ID": "CVE-2021-21973",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "VMware vCenter Server",
"version": {
"version_data": [
{
"version_value": "7.x before 7.0 U1c"
},
{
"version_value": "6.7 before 6.7 U3l"
},
{
"version_value": "6.5 before 6.5 U3n"
}
]
}
},
{
"product_name": "VMware Cloud Foundation",
"version": {
"version_data": [
{
"version_value": "4.x before 4.2"
},
{
"version_value": "3.x before 3.10.1.2"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2)."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "SSRF vulnerability"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.vmware.com/security/advisories/VMSA-2021-0002.html",
"refsource": "CONFIRM",
"url": "https://www.vmware.com/security/advisories/VMSA-2021-0002.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
"assignerShortName": "vmware",
"cveId": "CVE-2021-21973",
"datePublished": "2021-02-24T16:42:02.000Z",
"dateReserved": "2021-01-04T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:25:54.167Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"cisa_known_exploited": {
"cveID": "CVE-2021-21973",
"cwes": "[\"CWE-20\", \"CWE-918\"]",
"dateAdded": "2022-03-07",
"dueDate": "2022-03-21",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-21973",
"product": "vCenter Server and Cloud Foundation",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "VMware vCenter Server and Cloud Foundation Server contain a SSRF vulnerability due to improper validation of URLs in a vCenter Server plugin. This allows for information disclosure.",
"vendorProject": "VMware",
"vulnerabilityName": "VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.vmware.com/security/advisories/VMSA-2021-0002.html\", \"tags\": [\"x_refsource_CONFIRM\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T18:30:23.450Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-21973\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-02-16T16:16:46.429372Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2022-03-07\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21973\"}}}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2022-03-07T00:00:00.000Z\", \"value\": \"CVE-2021-21973 added to CISA KEV\"}], \"references\": [{\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21973\", \"tags\": [\"government-resource\"]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-918\", \"description\": \"CWE-918 Server-Side Request Forgery (SSRF)\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-04T19:21:58.466Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"VMware vCenter Server\", \"versions\": [{\"status\": \"affected\", \"version\": \"7.x before 7.0 U1c\"}, {\"status\": \"affected\", \"version\": \"6.7 before 6.7 U3l\"}, {\"status\": \"affected\", \"version\": \"6.5 before 6.5 U3n\"}]}, {\"vendor\": \"n/a\", \"product\": \"VMware Cloud Foundation\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.x before 4.2\"}, {\"status\": \"affected\", \"version\": \"3.x before 3.10.1.2\"}]}], \"references\": [{\"url\": \"https://www.vmware.com/security/advisories/VMSA-2021-0002.html\", \"tags\": [\"x_refsource_CONFIRM\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"SSRF vulnerability\"}]}], \"providerMetadata\": {\"orgId\": \"dcf2e128-44bd-42ed-91e8-88f912c1401d\", \"shortName\": \"vmware\", \"dateUpdated\": \"2021-02-24T16:42:02.000Z\"}, \"x_legacyV4Record\": {\"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_value\": \"7.x before 7.0 U1c\"}, {\"version_value\": \"6.7 before 6.7 U3l\"}, {\"version_value\": \"6.5 before 6.5 U3n\"}]}, \"product_name\": \"VMware vCenter Server\"}, {\"version\": {\"version_data\": [{\"version_value\": \"4.x before 4.2\"}, {\"version_value\": \"3.x before 3.10.1.2\"}]}, \"product_name\": \"VMware Cloud Foundation\"}]}, \"vendor_name\": \"n/a\"}]}}, \"data_type\": \"CVE\", \"references\": {\"reference_data\": [{\"url\": \"https://www.vmware.com/security/advisories/VMSA-2021-0002.html\", \"name\": \"https://www.vmware.com/security/advisories/VMSA-2021-0002.html\", \"refsource\": \"CONFIRM\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"SSRF vulnerability\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2021-21973\", \"STATE\": \"PUBLIC\", \"ASSIGNER\": \"security@vmware.com\"}}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-21973\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:25:54.167Z\", \"dateReserved\": \"2021-01-04T00:00:00.000Z\", \"assignerOrgId\": \"dcf2e128-44bd-42ed-91e8-88f912c1401d\", \"datePublished\": \"2021-02-24T16:42:02.000Z\", \"assignerShortName\": \"vmware\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
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…
Loading…