CVE-2021-36872 - Vulnerability Details - OpenCVE

Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type].

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

The EPSS score is 0.00223.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Wordpress Popular Posts Project	Wordpress Popular Posts

Configuration 1 [-]

cpe:2.3:a:wordpress_popular_posts_project:wordpress_popular_posts:*:*:*:*:*:wordpress:*:*

No data.

No data.

Advisories

Source	ID	Title
EUVD	EUVD-2021-23448	Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type].

Fixes

Solution

Update to version 5.3.4 or higher.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md
https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability

History

Fri, 28 Mar 2025 17:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: Patchstack

Published: 2021-09-23T15:00:55.804Z

Updated: 2025-03-28T16:55:01.742Z

Reserved: 2021-07-19T00:00:00.000Z

Link: CVE-2021-36872

Vulnrichment

Updated: 2024-08-04T01:01:59.774Z

NVD

Status : Modified

Published: 2021-09-23T15:15:07.840

Modified: 2024-11-21T06:14:13.750

Link: CVE-2021-36872

Redhat

No data.

OpenCVE Enrichment

No data.

{"containers": {"cna": {"affected": [{"product": "WordPress Popular Posts", "vendor": "Hector Cabrera", "versions": [{"lessThanOrEqual": "5.3.3", "status": "affected", "version": "5.3.3", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "Original researcher - Vlad Visse (Patchstack Red Team)"}], "datePublic": "2021-07-04T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type]."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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": "2021-09-23T15:00:55.000Z", "orgId": "21595511-bba5-4825-b968-b78d1f9984a3", "shortName": "Patchstack"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md"}, {"tags": ["x_refsource_MISC"], "url": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability"}], "solutions": [{"lang": "en", "value": "Update to version 5.3.4 or higher."}], "source": {"discovery": "EXTERNAL"}, "title": "WordPress Popular Posts plugin <= 5.3.3 - Authenticated Persistent Cross-Site Scripting (XSS) vulnerability", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "audit@patchstack.com", "DATE_PUBLIC": "2021-07-04T20:59:00.000Z", "ID": "CVE-2021-36872", "STATE": "PUBLIC", "TITLE": "WordPress Popular Posts plugin <= 5.3.3 - Authenticated Persistent Cross-Site Scripting (XSS) vulnerability"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "WordPress Popular Posts", "version": {"version_data": [{"version_affected": "<=", "version_name": "5.3.3", "version_value": "5.3.3"}]}}]}, "vendor_name": "Hector Cabrera"}]}}, "credit": [{"lang": "eng", "value": "Original researcher - Vlad Visse (Patchstack Red Team)"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type]."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md", "refsource": "CONFIRM", "url": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md"}, {"name": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability", "refsource": "MISC", "url": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability"}]}, "solution": [{"lang": "en", "value": "Update to version 5.3.4 or higher."}], "source": {"discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T01:01:59.774Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-03-28T16:54:33.992986Z", "id": "CVE-2021-36872", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-03-28T16:55:01.742Z"}}]}, "cveMetadata": {"assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3", "assignerShortName": "Patchstack", "cveId": "CVE-2021-36872", "datePublished": "2021-09-23T15:00:55.804Z", "dateReserved": "2021-07-19T00:00:00.000Z", "dateUpdated": "2025-03-28T16:55:01.742Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md", "tags": ["x_refsource_CONFIRM", "x_transferred"]}, {"url": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T01:01:59.774Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-36872", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-03-28T16:54:33.992986Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-03-28T16:54:29.465Z"}}], "cna": {"title": "WordPress Popular Posts plugin <= 5.3.3 - Authenticated Persistent Cross-Site Scripting (XSS) vulnerability", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "value": "Original researcher - Vlad Visse (Patchstack Red Team)"}], "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "Hector Cabrera", "product": "WordPress Popular Posts", "versions": [{"status": "affected", "version": "5.3.3", "versionType": "custom", "lessThanOrEqual": "5.3.3"}]}], "solutions": [{"lang": "en", "value": "Update to version 5.3.4 or higher."}], "datePublic": "2021-07-04T00:00:00.000Z", "references": [{"url": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability", "tags": ["x_refsource_MISC"]}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "descriptions": [{"lang": "en", "value": "Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type]."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Cross-site Scripting (XSS)"}]}], "providerMetadata": {"orgId": "21595511-bba5-4825-b968-b78d1f9984a3", "shortName": "Patchstack", "dateUpdated": "2021-09-23T15:00:55.000Z"}, "x_legacyV4Record": {"credit": [{"lang": "eng", "value": "Original researcher - Vlad Visse (Patchstack Red Team)"}], "impact": {"cvss": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}}, "source": {"discovery": "EXTERNAL"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_name": "5.3.3", "version_value": "5.3.3", "version_affected": "<="}]}, "product_name": "WordPress Popular Posts"}]}, "vendor_name": "Hector Cabrera"}]}}, "solution": [{"lang": "en", "value": "Update to version 5.3.4 or higher."}], "data_type": "CVE", "generator": {"engine": "Vulnogram 0.0.9"}, "references": {"reference_data": [{"url": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md", "name": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md", "refsource": "CONFIRM"}, {"url": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability", "name": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability", "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type]."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-79 Cross-site Scripting (XSS)"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-36872", "STATE": "PUBLIC", "TITLE": "WordPress Popular Posts plugin <= 5.3.3 - Authenticated Persistent Cross-Site Scripting (XSS) vulnerability", "ASSIGNER": "audit@patchstack.com", "DATE_PUBLIC": "2021-07-04T20:59:00.000Z"}}}}, "cveMetadata": {"cveId": "CVE-2021-36872", "state": "PUBLISHED", "dateUpdated": "2025-03-28T16:55:01.742Z", "dateReserved": "2021-07-19T00:00:00.000Z", "assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3", "datePublished": "2021-09-23T15:00:55.804Z", "assignerShortName": "Patchstack"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:wordpress_popular_posts_project:wordpress_popular_posts:*:*:*:*:*:wordpress:*:*", "matchCriteriaId": "ABBA2087-1173-4E73-9550-BFE7695987F7", "versionEndIncluding": "5.3.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type]."}, {"lang": "es", "value": "Una vulnerabilidad de tipo Cross-Site Scripting (XSS) Persistente Autenticado en el plugin Popular Posts de WordPress (versiones anteriores a 5.3.3, incluy\u00e9ndola). Vulnerable en &widget-wpp[2][post_type]"}], "id": "CVE-2021-36872", "lastModified": "2024-11-21T06:14:13.750", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 3.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.8, "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": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "audit@patchstack.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-09-23T15:15:07.840", "references": [{"source": "audit@patchstack.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md"}, {"source": "audit@patchstack.com", "tags": ["Third Party Advisory"], "url": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability"}], "sourceIdentifier": "audit@patchstack.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "audit@patchstack.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}