CVE-2026-21625

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-21625", "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "state": "PUBLISHED", "assignerShortName": "Joomla", "dateReserved": "2026-01-01T04:42:27.959Z", "datePublished": "2026-01-16T15:06:15.596Z", "dateUpdated": "2026-01-16T15:35:53.746Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "EasyDiscuss extension for Joomla", "vendor": "Stackideas.com", "versions": [{"status": "affected", "version": "1.0.0-5.0.15"}]}], "credits": [{"lang": "en", "type": "finder", "value": "simoni"}, {"lang": "en", "type": "sponsor", "value": "Swiss Paraplegic Research"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by file extensions, no mime type checks are happening."}], "value": "User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by file extensions, no mime type checks are happening."}], "impacts": [{"capecId": "CAPEC-17", "descriptions": [{"lang": "en", "value": "CAPEC-17 Using Malicious Files"}]}], "references": [{"tags": ["product"], "url": "https://stackideas.com/easydiscuss"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"version": "4.0", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "LOW", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "baseSeverity": "MEDIUM", "baseScore": 4.8, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "shortName": "Joomla", "dateUpdated": "2026-01-16T15:06:15.596Z"}, "source": {"discovery": "UNKNOWN"}, "title": "Extension - stackideas.com - Lack of mime type validation in EasyDiscuss component 1.0.0-5.0.15 for Joomla", "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-16T15:35:12.951462Z", "id": "CVE-2026-21625", "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": "2026-01-16T15:35:53.746Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-21625", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-16T15:35:12.951462Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-16T15:35:45.959Z"}}], "cna": {"title": "Extension - stackideas.com - Lack of mime type validation in EasyDiscuss component 1.0.0-5.0.15 for Joomla", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "simoni"}, {"lang": "en", "type": "sponsor", "value": "Swiss Paraplegic Research"}], "impacts": [{"capecId": "CAPEC-17", "descriptions": [{"lang": "en", "value": "CAPEC-17 Using Malicious Files"}]}], "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:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Stackideas.com", "product": "EasyDiscuss extension for Joomla", "versions": [{"status": "affected", "version": "1.0.0-5.0.15"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://stackideas.com/easydiscuss", "tags": ["product"]}], "x_generator": {"engine": "Vulnogram 0.1.0-dev"}, "descriptions": [{"lang": "en", "value": "User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by file extensions, no mime type checks are happening.", "supportingMedia": [{"type": "text/html", "value": "User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by file extensions, no mime type checks are happening.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type"}]}], "providerMetadata": {"orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "shortName": "Joomla", "dateUpdated": "2026-01-16T15:06:15.596Z"}}}, "cveMetadata": {"cveId": "CVE-2026-21625", "state": "PUBLISHED", "dateUpdated": "2026-01-16T15:35:53.746Z", "dateReserved": "2026-01-01T04:42:27.959Z", "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586", "datePublished": "2026-01-16T15:06:15.596Z", "assignerShortName": "Joomla"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "EasyDiscuss extension for Joomla", "vendor": "Stackideas.com", "versions": [{"status": "affected", "version": "1.0.0-5.0.15"}]}], "source": "security@joomla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:stackideas:easydiscuss:*:*:*:*:*:joomla\\!:*:*", "matchCriteriaId": "1F4EB9D6-4491-4616-8485-B1FDFF3B88E7", "versionEndIncluding": "5.0.15", "versionStartIncluding": "1.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by file extensions, no mime type checks are happening."}, {"lang": "es", "value": "Cargas proporcionadas por el usuario al componente Easy Discuss para Joomla no se validan correctamente. Las cargas se verifican puramente por extensiones de archivo, no se realizan comprobaciones de tipo MIME."}], "id": "CVE-2026-21625", "lastModified": "2026-06-17T10:18:49.773", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L/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": "security@joomla.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21625", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-16T15:35:12.951462Z", "version": "2.0.3"}}]}, "published": "2026-01-16T15:15:55.017", "references": [{"source": "security@joomla.org", "tags": ["Third Party Advisory"], "url": "https://stackideas.com/easydiscuss"}], "sourceIdentifier": "security@joomla.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-434"}], "source": "security@joomla.org", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T20:14:37.830498+00:00", "value": {"mitigation_remediation": ["Update Easy Discuss to a patched version that includes MIME type validation", "If an immediate upgrade is not possible, restrict the upload directory so that uploaded files cannot be executed (e.g., remove execute permissions on the directory or configure the web server to treat uploaded files as non-executable types)", "Review and tighten user permissions for the upload feature, or disable uploads for untrusted users, and monitor the upload directory for unexpected or suspicious files"], "summary": {"action": "Patch", "impact": "Arbitrary file upload via MIME type bypass"}, "threat_synthesis": {"affected_systems": "Stackideas EasyDiscuss extension for Joomla versions 1.0.0 through 5.0.15 is affected. Administrators using any edition of these releases should verify the build number against the vulnerable range.", "description_and_impact": "The Easy Discuss component for Joomla verifies uploads only by file extension, ignoring the MIME type reported by the browser or derived from file content, a flaw that constitutes a CWE-434 vulnerability (Unrestricted upload of binaries). This oversight allows an attacker to supply a file whose name ends with a permitted extension\u2014such as .jpg or .png\u2014while embedding executable code or scripts inside the payload. If the server later serves or executes the file, the attacker could gain local code execution, upload backdoors, or compromise the entire Joomla installation (inferred).", "risk_and_exploitability": "The vulnerability carries a CVSS base score of 4.8, indicating moderate severity, while the EPSS score is below 1\u202f%, suggesting a low probability of exploitation in the wild. The issue is not listed in the CISA KEV catalog, further implying limited public exploitation. It is inferred that attackers would typically need to interact with the public upload interface or compromise an authenticated user to upload the malicious file, after which they could exploit the server\u2019s ability to serve or execute the file."}}}}, "created": "2026-01-19T09:20:59.663919+00:00", "updated": "2026-04-18T20:15:09.552896+00:00", "vendors": ["joomla", "joomla$PRODUCT$joomla", "joomla$PRODUCT$joomla!", "stackideas", "stackideas$PRODUCT$easydiscuss"]}