CVE-2017-20206

{"id": "CVE-2017-20206", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security@wordfence.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2025-10-18T04:15:43.243", "references": [{"url": "https://plugins.trac.wordpress.org/changeset/1733186/appointments", "tags": ["Patch"], "source": "security@wordfence.com"}, {"url": "https://www.wordfence.com/blog/2017/10/3-zero-day-plugin-vulnerabilities-exploited-wild/", "tags": ["Press/Media Coverage", "Third Party Advisory"], "source": "security@wordfence.com"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/7e8f230e-3f96-4efd-806d-72725b960303?source=cve", "tags": ["Third Party Advisory"], "source": "security@wordfence.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@wordfence.com", "description": [{"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "The Appointments plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.2.1 via deserialization of untrusted input from the `wpmudev_appointments` cookie. This allows unauthenticated attackers to inject a PHP Object. Attackers were actively exploiting this vulnerability with the WP_Theme() class to create backdoors."}], "lastModified": "2025-12-23T17:06:57.133", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:wpmudev:appointments:*:*:*:*:*:wordpress:*:*", "vulnerable": true, "matchCriteriaId": "272E0BE3-D34B-439D-9993-BBB19DBD1B0D", "versionEndIncluding": "2.2.1"}], "operator": "OR"}]}], "sourceIdentifier": "security@wordfence.com"}