CVE-2021-38356 (GCVE-0-2021-38356)
Vulnerability from cvelistv5 – Published: 2021-11-01 21:01 – Updated: 2025-03-31 17:46
VLAI
EPSS
VEX
Title
NextScripts: Social Networks Auto-Poster <= 4.3.20 Reflected Cross-Site Scripting
Summary
The NextScripts: Social Networks Auto-Poster <= 4.3.20 WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the $_REQUEST['page'] parameter which is echoed out on inc/nxs_class_snap.php by supplying the appropriate value 'nxssnap-post' to load the page in $_GET['page'] along with malicious JavaScript in $_POST['page'].
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-31 17:46 UTC
CWE
- CWE-79 - Cross-site Scripting (XSS)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.wordfence.com/blog/2021/10/xss-vulner… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| NextScripts | NextScripts: Social Networks Auto-Poster |
Affected:
4.3.20 , ≤ 4.3.20
(custom)
|
guessed |
Date Public
2021-11-28 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T01:37:16.565Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-38356",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-03-31T17:46:35.754916Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-03-31T17:46:39.437Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"platforms": [
"WordPress"
],
"product": "NextScripts: Social Networks Auto-Poster",
"vendor": "NextScripts",
"versions": [
{
"lessThanOrEqual": "4.3.20",
"status": "affected",
"version": "4.3.20",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Ramuel Gall, Wordfence"
}
],
"datePublic": "2021-11-28T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the $_REQUEST[\u0027page\u0027] parameter which is echoed out on inc/nxs_class_snap.php by supplying the appropriate value \u0027nxssnap-post\u0027 to load the page in $_GET[\u0027page\u0027] along with malicious JavaScript in $_POST[\u0027page\u0027]."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Cross-site Scripting (XSS)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-11-01T21:01:08.000Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/"
}
],
"source": {
"discovery": "INTERNAL"
},
"title": "NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 Reflected Cross-Site Scripting",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"AKA": "Wordfence",
"ASSIGNER": "security@wordfence.com",
"DATE_PUBLIC": "2021-11-28T10:14:00.000Z",
"ID": "CVE-2021-38356",
"STATE": "PUBLIC",
"TITLE": "NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 Reflected Cross-Site Scripting"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "NextScripts: Social Networks Auto-Poster",
"version": {
"version_data": [
{
"platform": "WordPress",
"version_affected": "\u003c=",
"version_name": "4.3.20",
"version_value": "4.3.20"
}
]
}
}
]
},
"vendor_name": "NextScripts"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Ramuel Gall, Wordfence"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "The NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the $_REQUEST[\u0027page\u0027] parameter which is echoed out on inc/nxs_class_snap.php by supplying the appropriate value \u0027nxssnap-post\u0027 to load the page in $_GET[\u0027page\u0027] along with malicious JavaScript in $_POST[\u0027page\u0027]."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-79 Cross-site Scripting (XSS)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/",
"refsource": "MISC",
"url": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/"
}
]
},
"source": {
"discovery": "INTERNAL"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2021-38356",
"datePublished": "2021-11-01T21:01:08.103Z",
"dateReserved": "2021-08-09T00:00:00.000Z",
"dateUpdated": "2025-03-31T17:46:39.437Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-38356",
"date": "2026-09-21",
"epss": "0.00873",
"percentile": "0.5686"
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nextscripts:social_networks_auto_poster:*:*:*:*:*:wordpress:*:*",
"matchCriteriaId": "4CA5FA9D-4DA5-4C01-AFA1-053D3CC7659B",
"versionEndIncluding": "4.3.20",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the $_REQUEST[\u0027page\u0027] parameter which is echoed out on inc/nxs_class_snap.php by supplying the appropriate value \u0027nxssnap-post\u0027 to load the page in $_GET[\u0027page\u0027] along with malicious JavaScript in $_POST[\u0027page\u0027]."
},
{
"lang": "es",
"value": "El plugin NextScripts: Social Networks Auto-Poster de WordPress versiones anteriores a 4.3.20 incluy\u00e9ndola, es vulnerable a un ataque de tipo Cross-Site Scripting Reflejado por medio del par\u00e1metro $_REQUEST[\"page\"] que se hace eco en inc/nxs_class_snap.php al suministrar el valor apropiado \"nxssnap-post\" para cargar la p\u00e1gina en $_GET[\"page\"] junto con JavaScript malicioso en $_POST[\"page\"]"
}
],
"id": "CVE-2021-38356",
"lastModified": "2024-11-21T06:16:53.390",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 2.7,
"source": "security@wordfence.com",
"type": "Secondary"
}
]
},
"published": "2021-11-01T21:15:07.680",
"references": [
{
"source": "security@wordfence.com",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/"
}
],
"sourceIdentifier": "security@wordfence.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-79"
}
],
"source": "security@wordfence.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2025-05-29T04:50:18+00:00",
"cve": "CVE-2021-38356",
"id": "CVE-2021-38356",
"initial_release_date": "2021-11-28T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 Reflected Cross-Site Scripting",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-38356.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T01:37:16.565Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-38356",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-03-31T17:46:35.754916Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-03-31T17:46:31.490Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"platforms": [
"WordPress"
],
"product": "NextScripts: Social Networks Auto-Poster",
"vendor": "NextScripts",
"versions": [
{
"lessThanOrEqual": "4.3.20",
"status": "affected",
"version": "4.3.20",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Ramuel Gall, Wordfence"
}
],
"datePublic": "2021-11-28T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the $_REQUEST[\u0027page\u0027] parameter which is echoed out on inc/nxs_class_snap.php by supplying the appropriate value \u0027nxssnap-post\u0027 to load the page in $_GET[\u0027page\u0027] along with malicious JavaScript in $_POST[\u0027page\u0027]."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Cross-site Scripting (XSS)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-11-01T21:01:08.000Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/"
}
],
"source": {
"discovery": "INTERNAL"
},
"title": "NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 Reflected Cross-Site Scripting",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"AKA": "Wordfence",
"ASSIGNER": "security@wordfence.com",
"DATE_PUBLIC": "2021-11-28T10:14:00.000Z",
"ID": "CVE-2021-38356",
"STATE": "PUBLIC",
"TITLE": "NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 Reflected Cross-Site Scripting"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "NextScripts: Social Networks Auto-Poster",
"version": {
"version_data": [
{
"platform": "WordPress",
"version_affected": "\u003c=",
"version_name": "4.3.20",
"version_value": "4.3.20"
}
]
}
}
]
},
"vendor_name": "NextScripts"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Ramuel Gall, Wordfence"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "The NextScripts: Social Networks Auto-Poster \u003c= 4.3.20 WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the $_REQUEST[\u0027page\u0027] parameter which is echoed out on inc/nxs_class_snap.php by supplying the appropriate value \u0027nxssnap-post\u0027 to load the page in $_GET[\u0027page\u0027] along with malicious JavaScript in $_POST[\u0027page\u0027]."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-79 Cross-site Scripting (XSS)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/",
"refsource": "MISC",
"url": "https://www.wordfence.com/blog/2021/10/xss-vulnerability-in-nextscripts-social-networks-auto-poster-plugin-impacts-100000-sites/"
}
]
},
"source": {
"discovery": "INTERNAL"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2021-38356",
"datePublished": "2021-11-01T21:01:08.103Z",
"dateReserved": "2021-08-09T00:00:00.000Z",
"dateUpdated": "2025-03-31T17:46:39.437Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…