CVE-2026-1821

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Microtango", "vendor": "microtango", "versions": [{"lessThanOrEqual": "0.9.29", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Microtango plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'restkey' parameter of the mt_reservation shortcode in all versions up to, and including, 0.9.29 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."}, {"lang": "es", "value": "El plugin Microtango para WordPress es vulnerable a Cross-Site Scripting Almacenado a trav\u00e9s del par\u00e1metro 'restkey' del shortcode mt_reservation en todas las versiones hasta la 0.9.29, inclusive, debido a una sanitizaci\u00f3n de entrada y un escape de salida insuficientes. Esto permite a atacantes autenticados, con acceso de nivel Colaborador y superior, inyectar scripts web arbitrarios en p\u00e1ginas que se ejecutar\u00e1n cada vez que un usuario acceda a una p\u00e1gina inyectada."}], "id": "CVE-2026-1821", "lastModified": "2026-06-17T10:16:34.183", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.1, "impactScore": 2.7, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-1821", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-11T15:37:12.732458Z", "version": "2.0.3"}}]}, "published": "2026-02-11T09:15:52.213", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/microtango/tags/0.9.29/microtango-init.php#L129"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/microtango/trunk/microtango-init.php#L129"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset/3455880/"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/27657d29-e834-4f05-8fe9-7db0ab96f67d?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.0.0,0.9.29]"}}], "product": "microtango", "vendor": "microtango"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "product": "wordpress", "vendor": "wordpress"}], "analysis": {"en": {"generated_at": "2026-04-15T21:13:36.034756+00:00", "value": {"mitigation_remediation": ["Update Microtango to the latest release (\u2265\u202f0.9.30) to remove the vulnerable shortcode handling.", "If an update is not possible, delete or sanitize all instances of the mt_reservation shortcode from posts and pages.", "Restrict or disable Contributor-level access for users who do not need the ability to edit or add content, thereby limiting the attack surface."], "summary": {"action": "Apply Patch", "impact": "Stored Cross-Site Scripting (XSS) allowing script execution by authenticated contributors"}, "threat_synthesis": {"affected_systems": "All releases of Microtango up to and including version 0.9.29 that feature the mt_reservation shortcode. The plugin is distributed through WordPress.org and used by any WordPress installation that incorporates the affected plugin.", "description_and_impact": "The Microtango plugin permits authenticated WordPress users with Contributor or higher privileges to inject arbitrary scripts into pages through the unsanitized \u2018restkey\u2019 parameter of the mt_reservation shortcode. Injected scripts are stored and executed in the browser context of any visitor to the affected page, enabling attacks that compromise confidentiality, integrity, and availability of site content. The weakness is a classic input validation failure classified as CWE\u201179.", "risk_and_exploitability": "The vulnerability carries a CVSS score of 6.4, indicating moderate severity. The EPSS score is reported as less than 1\u202f%, suggesting a low but non-zero likelihood of exploitation, and the issue is not listed in the CISA KEV catalog. Because the attack requires only authenticated Contributor\u2011level access, a relatively broad set of users can exploit it; however the stored nature of the XSS means that any subsequent reviewer of the affected page will experience arbitrary script execution. Exporting or re\u2011deploying the site without remediation does not mitigate the risk; the only reliable defense is to update or disable the affected functionality."}}}}, "created": "2026-02-11T21:46:06.342957+00:00", "updated": "2026-04-15T21:15:13.589892+00:00", "vendors": ["microtango", "microtango$PRODUCT$microtango", "wordpress", "wordpress$PRODUCT$wordpress"]}