{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43876", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-04T15:17:09.329Z", "datePublished": "2026-05-11T20:33:26.198Z", "dateUpdated": "2026-05-13T14:39:26.400Z"}, "containers": {"cna": {"title": "WWBN AVideo: HTML Injection in notifySubscribers.json.php Enables Platform-Branded Phishing Emails to Channel Subscribers", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g9cm-rxp7-6gv5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g9cm-rxp7-6gv5"}, {"name": "https://github.com/WWBN/AVideo/commit/078c4342eb9969a70425a9cdca3eefa7f8a86d53", "tags": ["x_refsource_MISC"], "url": "https://github.com/WWBN/AVideo/commit/078c4342eb9969a70425a9cdca3eefa7f8a86d53"}], "affected": [{"vendor": "WWBN", "product": "AVideo", "versions": [{"version": "<= 29.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-11T20:33:26.198Z"}, "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/notifySubscribers.json.php takes the raw message POST parameter and passes it into sendSiteEmail(), which substitutes it directly into an HTML email template (via str_replace on the {message} placeholder) and renders it with PHPMailer::msgHTML(). There is no HTML sanitization, character escaping, or output encoding on the attacker-controlled message between $_POST['message'] and the rendered email. Any authenticated user with upload permission can therefore broadcast arbitrary HTML \u2014 phishing links, tracking pixels, CSS/UI spoofing \u2014 to every subscriber on their channel (up to 10,000 recipients per invocation). The email is sent From: the platform's configured contact address and wrapped in the site's official logo and title, so attacker-supplied HTML arrives with the appearance of an official platform communication. Commit https://github.com/WWBN/AVideo/commit/ contains an updated fix."}], "source": {"advisory": "GHSA-g9cm-rxp7-6gv5", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g9cm-rxp7-6gv5", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-13T14:01:48.068825Z", "id": "CVE-2026-43876", "options": [{"Exploitation": "poc"}, {"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": "2026-05-13T14:39:26.400Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43876", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-13T14:01:48.068825Z"}}}], "references": [{"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g9cm-rxp7-6gv5", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-13T14:01:58.619Z"}}], "cna": {"title": "WWBN AVideo: HTML Injection in notifySubscribers.json.php Enables Platform-Branded Phishing Emails to Channel Subscribers", "source": {"advisory": "GHSA-g9cm-rxp7-6gv5", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "WWBN", "product": "AVideo", "versions": [{"status": "affected", "version": "<= 29.0"}]}], "references": [{"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g9cm-rxp7-6gv5", "name": "https://github.com/WWBN/AVideo/security/advisories/GHSA-g9cm-rxp7-6gv5", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/WWBN/AVideo/commit/078c4342eb9969a70425a9cdca3eefa7f8a86d53", "name": "https://github.com/WWBN/AVideo/commit/078c4342eb9969a70425a9cdca3eefa7f8a86d53", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/notifySubscribers.json.php takes the raw message POST parameter and passes it into sendSiteEmail(), which substitutes it directly into an HTML email template (via str_replace on the {message} placeholder) and renders it with PHPMailer::msgHTML(). There is no HTML sanitization, character escaping, or output encoding on the attacker-controlled message between $_POST['message'] and the rendered email. Any authenticated user with upload permission can therefore broadcast arbitrary HTML \u2014 phishing links, tracking pixels, CSS/UI spoofing \u2014 to every subscriber on their channel (up to 10,000 recipients per invocation). The email is sent From: the platform's configured contact address and wrapped in the site's official logo and title, so attacker-supplied HTML arrives with the appearance of an official platform communication. Commit https://github.com/WWBN/AVideo/commit/ contains an updated fix."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-11T20:33:26.198Z"}}}, "cveMetadata": {"cveId": "CVE-2026-43876", "state": "PUBLISHED", "dateUpdated": "2026-05-13T14:39:26.400Z", "dateReserved": "2026-05-04T15:17:09.329Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-11T20:33:26.198Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,29.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "AVideo", "source": "cna", "vendor": "WWBN"}, "product": "avideo", "vendor": "wwbn"}], "created": "2026-05-11T22:45:36.085043+00:00", "updated": "2026-05-11T23:00:19.468419+00:00", "vendors": ["wwbn", "wwbn$PRODUCT$avideo"]}