{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121763", "assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3", "state": "PUBLISHED", "assignerShortName": "Patchstack", "dateReserved": "2026-11-04T00:24:30.153Z", "datePublished": "2026-11-09T10:00:14.148Z", "dateUpdated": "2026-11-09T10:00:14.148Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "21595511-bba5-4825-b968-b78d1f9984a3", "shortName": "Patchstack", "dateUpdated": "2026-11-09T10:00:14.148Z"}, "title": "WordPress Hummingbird plugin <= 3.21.2 - Cross Site Scripting (XSS) vulnerability", "datePublic": "2026-11-07T09:43:55.000Z", "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPMU DEV Hummingbird hummingbird-performance allows Stored XSS.This issue affects Hummingbird: from n/a through 3.21.2.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPMU DEV Hummingbird hummingbird-performance allows Stored XSS.<p>This issue affects Hummingbird: from n/a through 3.21.2.</p>"}]}], "affected": [{"vendor": "WPMU DEV", "product": "Hummingbird", "packageName": "hummingbird-performance", "collectionURL": "https://wordpress.org/plugins", "defaultStatus": "unaffected", "versions": [{"version": "0", "versionType": "custom", "status": "affected", "lessThanOrEqual": "3.21.2", "changes": [{"at": "4.0.0", "status": "unaffected"}]}]}], "references": [{"url": "https://patchstack.com/database/wordpress/plugin/hummingbird-performance/vulnerability/wordpress-hummingbird-plugin-3-21-2-cross-site-scripting-xss-vulnerability?_s_id=cve", "tags": ["vdb-entry"]}], "credits": [{"lang": "en", "value": "mroccon | Patchstack Bug Bounty Program", "type": "finder"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "Stored XSS"}]}], "solutions": [{"lang": "en", "value": "Update the WordPress Hummingbird plugin to the latest available version (at least 4.0.0).", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Update the WordPress Hummingbird plugin to the latest available version (at least 4.0.0)."}]}], "tags": ["x_open-source"]}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://wordpress.org/plugins", "defaultStatus": "unaffected", "packageName": "hummingbird-performance", "product": "Hummingbird", "vendor": "WPMU DEV", "versions": [{"changes": [{"at": "4.0.0", "status": "unaffected"}], "lessThanOrEqual": "3.21.2", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "audit@patchstack.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPMU DEV Hummingbird hummingbird-performance allows Stored XSS.This issue affects Hummingbird: from n/a through 3.21.2."}], "id": "CVE-2026-121763", "lastModified": "2026-11-09T10:17:07.440", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.5, "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:L", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 3.7, "source": "audit@patchstack.com", "type": "Secondary"}]}, "published": "2026-11-09T10:17:07.240", "references": [{"source": "audit@patchstack.com", "url": "https://patchstack.com/database/wordpress/plugin/hummingbird-performance/vulnerability/wordpress-hummingbird-plugin-3-21-2-cross-site-scripting-xss-vulnerability?_s_id=cve"}], "sourceIdentifier": "audit@patchstack.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "audit@patchstack.com", "type": "Primary"}]}

{}

{"created": "2026-11-09T11:30:10.045939+00:00", "updated": "2026-11-09T11:30:10.045944+00:00", "vendors": []}