CVE-2026-1944

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "CallbackKiller service widget", "vendor": "krellbat", "versions": [{"lessThanOrEqual": "1.2", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The CallbackKiller service widget plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the cbk_save() function in all versions up to, and including, 1.2. This makes it possible for unauthenticated attackers to modify the plugin's site ID settings via the 'cbk_save_v1' AJAX action."}, {"lang": "es", "value": "El plugin de widget de servicio CallbackKiller para WordPress es vulnerable a la modificaci\u00f3n no autorizada de datos debido a una comprobaci\u00f3n de capacidad faltante en la funci\u00f3n cbk_save() en todas las versiones hasta la 1.2, inclusive. Esto hace posible que atacantes no autenticados modifiquen la configuraci\u00f3n del ID de sitio del plugin a trav\u00e9s de la acci\u00f3n AJAX cbk_save_v1."}], "id": "CVE-2026-1944", "lastModified": "2026-06-17T10:16:45.647", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-1944", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-18T20:35:04.029321Z", "version": "2.0.3"}}]}, "published": "2026-02-14T07:16:12.150", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L133"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L34"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L133"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L34"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/98a7572d-9642-4150-8112-c0fa2b25ae05?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.2]"}}], "product": "callbackkiller_service_widget", "vendor": "krellbat"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "product": "wordpress", "vendor": "wordpress"}], "analysis": {"en": {"generated_at": "2026-04-15T18:28:24.073240+00:00", "value": {"mitigation_remediation": ["Upgrade the CallbackKiller service widget to the newest release that includes a proper capability check or remove the plugin if no update is available.", "If an update is not an option, modify the cbk_save() function (or the Ajax handler) to include a capability check such as current_user_can('manage_options') and a nonce validation to ensure only authorized users can invoke the action.", "As a last resort, disable the widget entirely or block access to the Ajax endpoint using a firewall rule or .htaccess restrictions to prevent unauthenticated callers."], "summary": {"action": "Patch Now", "impact": "Unauthorized Configuration Change"}, "threat_synthesis": {"affected_systems": "The vulnerable product is the CallbackKiller service widget developed by krellbat for WordPress. All releases with a version number of 1.2 or lower are affected. WordPress sites that have installed or are still using any of these versions are at risk.", "description_and_impact": "The CallbackKiller service widget, a WordPress plugin, suffers from a missing capability check in the cbk_save() function across all versions up to 1.2. This flaw allows any visitor to invoke the Ajax endpoint cbk_save_v1 and alter the plugin\u2019s site ID settings without authentication, effectively modifying configuration data. The vulnerability enables unauthorized data modification but does not provide immediate code execution.", "risk_and_exploitability": "The CVSS score of 5.3 indicates a moderate severity, while the EPSS score of less than 1% reflects a very low likelihood of exploitation in the wild. The vulnerability is not listed in the CISA KEV catalog. An unauthenticated attacker can directly send an Ajax request to the cbk_save_v1 endpoint, bypassing any capability checks, because the plugin lacks proper authorization logic. The attack vector is publicly accessible through the target site\u2019s URL."}}}}, "created": "2026-02-16T12:02:13.758163+00:00", "updated": "2026-04-15T18:30:10.962827+00:00", "vendors": ["krellbat", "krellbat$PRODUCT$callbackkiller_service_widget", "wordpress", "wordpress$PRODUCT$wordpress"]}