CVE-2026-28561

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-28561", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-02-28T18:54:23.281Z", "datePublished": "2026-02-28T21:47:40.861Z", "dateUpdated": "2026-05-11T23:11:41.206Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-05-11T23:11:41.206Z"}, "title": "wpForo Forum 2.4.14 Stored XSS via Unescaped Forum Description in Templates", "descriptions": [{"lang": "en", "value": "wpForo Forum 2.4.14 contains a stored cross-site scripting vulnerability that allows administrators to inject persistent JavaScript via forum description fields echoed without output escaping across multiple theme template files. On multisite installations or with a compromised admin account, attackers set a forum description containing HTML event handlers that execute when any user views the forum listing."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "cweId": "CWE-79", "type": "CWE"}]}], "affected": [{"vendor": "gVectors Team", "product": "wpForo Forum", "versions": [{"status": "affected", "version": "2.4", "lessThan": "2.4.16", "versionType": "custom"}, {"status": "unaffected", "version": "2.4.16", "versionType": "semver"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:gvectors:wpforo_forum:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.4", "versionEndExcluding": "2.4.16"}, {"vulnerable": false, "criteria": "cpe:2.3:a:gvectors:wpforo_forum:2.4.16:*:*:*:*:*:*:*"}]}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 4.8, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS"}, {"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"}, "format": "CVSS"}], "references": [{"url": "https://wordpress.org/plugins/wpforo/", "name": "wpForo Forum WordPress Plugin", "tags": ["product"]}, {"url": "https://wordpress.org/plugins/wpforo/#developers", "name": "wpForo Forum Contributors & Developers", "tags": ["patch"]}, {"name": "VulnCheck Advisory: wpForo Forum 2.4.14 Stored XSS via Unescaped Forum Description in Templates", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/wpforo-forum-stored-xss-via-unescaped-forum-description-in-templates"}], "credits": [{"lang": "en", "value": "Scott Moore - VulnCheck", "type": "finder"}], "x_generator": {"engine": "scooter"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-02T21:05:17.439489Z", "id": "CVE-2026-28561", "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": "2026-03-06T15:12:00.777Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-28561", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-02T21:05:17.439489Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-06T15:11:57.000Z"}}], "cna": {"title": "wpForo Forum 2.4.14 Stored XSS via Unescaped Forum Description in Templates", "credits": [{"lang": "en", "type": "finder", "value": "Scott Moore - VulnCheck"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 4.8, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}}, {"format": "CVSS", "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": "gVectors Team", "product": "wpForo Forum", "versions": [{"status": "affected", "version": "2.4", "lessThan": "2.4.16", "versionType": "custom"}, {"status": "unaffected", "version": "2.4.16", "versionType": "semver"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://wordpress.org/plugins/wpforo/", "name": "wpForo Forum WordPress Plugin", "tags": ["product"]}, {"url": "https://wordpress.org/plugins/wpforo/#developers", "name": "wpForo Forum Contributors & Developers", "tags": ["patch"]}, {"url": "https://www.vulncheck.com/advisories/wpforo-forum-stored-xss-via-unescaped-forum-description-in-templates", "name": "VulnCheck Advisory: wpForo Forum 2.4.14 Stored XSS via Unescaped Forum Description in Templates", "tags": ["third-party-advisory"]}], "x_generator": {"engine": "scooter"}, "descriptions": [{"lang": "en", "value": "wpForo Forum 2.4.14 contains a stored cross-site scripting vulnerability that allows administrators to inject persistent JavaScript via forum description fields echoed without output escaping across multiple theme template files. On multisite installations or with a compromised admin account, attackers set a forum description containing HTML event handlers that execute when any user views the forum listing."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gvectors:wpforo_forum:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "2.4.16", "versionStartIncluding": "2.4"}, {"criteria": "cpe:2.3:a:gvectors:wpforo_forum:2.4.16:*:*:*:*:*:*:*", "vulnerable": false}], "operator": "OR"}], "operator": "OR"}], "providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-05-11T23:11:41.206Z"}}}, "cveMetadata": {"cveId": "CVE-2026-28561", "state": "PUBLISHED", "dateUpdated": "2026-05-11T23:11:41.206Z", "dateReserved": "2026-02-28T18:54:23.281Z", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "datePublished": "2026-02-28T21:47:40.861Z", "assignerShortName": "VulnCheck"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "wpForo Forum", "vendor": "gVectors Team", "versions": [{"lessThan": "2.4.16", "status": "affected", "version": "2.4", "versionType": "custom"}, {"status": "unaffected", "version": "2.4.16", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:gvectors:wpforo_forum:*:*:*:*:*:wordpress:*:*", "matchCriteriaId": "C566DBB2-78C1-44FF-A504-07BC985A687A", "versionEndExcluding": "2.4.16", "versionStartIncluding": "2.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "wpForo Forum 2.4.14 contains a stored cross-site scripting vulnerability that allows administrators to inject persistent JavaScript via forum description fields echoed without output escaping across multiple theme template files. On multisite installations or with a compromised admin account, attackers set a forum description containing HTML event handlers that execute when any user views the forum listing."}, {"lang": "es", "value": "wpForo Forum 2.4.14 contiene una vulnerabilidad de cross-site scripting almacenado que permite a los administradores inyectar JavaScript persistente a trav\u00e9s de campos de descripci\u00f3n del foro mostrados sin escape de salida en m\u00faltiples archivos de plantilla de tema. En instalaciones multisitio o con una cuenta de administrador comprometida, los atacantes establecen una descripci\u00f3n del foro que contiene controladores de eventos HTML que se ejecutan cuando cualquier usuario ve el listado del foro."}], "id": "CVE-2026-28561", "lastModified": "2026-06-17T10:28:51.330", "metrics": {"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": "disclosure@vulncheck.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-28561", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-02T21:05:17.439489Z", "version": "2.0.3"}}]}, "published": "2026-02-28T22:16:03.347", "references": [{"source": "disclosure@vulncheck.com", "tags": ["Product"], "url": "https://wordpress.org/plugins/wpforo/"}, {"source": "disclosure@vulncheck.com", "tags": ["Release Notes"], "url": "https://wordpress.org/plugins/wpforo/#developers"}, {"source": "disclosure@vulncheck.com", "tags": ["Third Party Advisory"], "url": "https://www.vulncheck.com/advisories/wpforo-forum-stored-xss-via-unescaped-forum-description-in-templates"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.4,2.4.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "2.4.16"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "wpForo Forum", "source": "cna", "vendor": "gVectors Team"}, "product": "wpforo_forum", "vendor": "gvectors"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "wordpress", "vendor": "wordpress"}], "analysis": {"en": {"generated_at": "2026-04-17T13:48:20.660398+00:00", "value": {"mitigation_remediation": ["Update wpForo Forum plugin to version\u202f2.4.16 or later.", "If an update is not feasible, modify theme template files to escape or strip untrusted content from forum descriptions, preventing XSS rendering.", "As an interim workaround, manually sanitize existing forum descriptions in the database to remove any embedded JavaScript or event handlers."], "summary": {"action": "Update Plugin", "impact": "Stored Cross\u2011Site Scripting"}, "threat_synthesis": {"affected_systems": "The vulnerability affects installations of the gVectors Team's wpForo Forum WordPress plugin version\u202f2.4.14. It is also relevant for multisite WordPress configurations or sites where an attacker has gained administrative privileges, as the malicious JavaScript is embedded in stored forum descriptions.", "description_and_impact": "The wpForo Forum plugin version\u202f2.4.14 has a stored cross\u2011site scripting flaw that allows an administrator to inject persistent JavaScript into forum descriptions. Because the plugin echoes these descriptions without escaping across multiple theme template files, the malicious script runs automatically whenever a user views the forum listing. This may facilitate browser\u2011side attacks that rely on the victim\u2019s context; based on the description, it is inferred that such attacks could include cookie theft, session hijacking, or defacement.", "risk_and_exploitability": "The CVSS v3.1 score of 4.8 denotes a moderate severity, while an EPSS score of less than\u202f1\u202f% indicates a low likelihood of exploitation. The flaw is not listed in the CISA KEV catalog. Attackers would need administrative access to create the malicious forum description or an exploited multisite site could expose all users to the stored XSS. Once executed, the payload can be used for numerous browser\u2011side attacks, but it does not provide remote code execution on the server itself."}}}}, "created": "2026-03-02T12:04:17.229260+00:00", "updated": "2026-04-17T14:00:15.798157+00:00", "vendors": ["gvectors", "gvectors$PRODUCT$wpforo_forum", "wordpress", "wordpress$PRODUCT$wordpress"]}