EUVD-2026-90218
GHSA-x7g5-c7fw-ccq6
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable plugin input with only Contributor auth (PR:L) and no user interaction; object injection can reach a gadget chain yielding full CIA impact, matching Patchstack's rating.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Contributor PHP Object Injection in Schema & Structured Data for WP & AMP <= 1.66 versions.
AnalysisAI
PHP object injection in the Schema & Structured Data for WP & AMP plugin (all versions up to and including 1.66) lets an authenticated attacker with a Contributor-level WordPress account feed crafted serialized input into a plugin deserialization path, and the vendor's CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, 8.8 High) rates that as low-complexity, network-reachable and capable of full confidentiality, integrity and availability impact once a usable POP gadget chain is available in the plugin, WordPress core or another installed component. Authentication is mandatory and there is no unauthenticated route, but no user interaction is required after the attacker holds a qualifying account; the practical exposure therefore depends on whether the site permits open registration or loosely manages Contributor roles. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated WordPress account with at least Contributor-level privileges (per the advisory title and PR:L), on a site running Schema & Structured Data for WP & AMP version 1.66 or earlier. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, 8.8 High) frames this as a network-reachable, low-complexity flaw requiring only low privileges and no user interaction, with full CIA impact - consistent with CWE-502 PHP Object Injection that can escalate to remote code execution, file operations, or data tampering when a suitable POP gadget chain is present. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch version is identified in the available intelligence, so the first action is to track the vendor/Patchstack advisory (https://patchstack.com/database/wordpress/plugin/schema-and-structured-data-for-wp/vulnerability/wordpress-schema-structured-data-for-wp-amp-plugin-1-66-php-object-injection-vulnerability) and update Schema & Structured Data for WP & AMP to the first release published after the 1.66 boundary as soon as it appears; until then treat every installation at or below 1.66 as vulnerable. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all WordPress installations running Schema & Structured Data for WP & AMP through version 1.66, restrict, disable, or remove Contributor-level accounts that are not strictly required, and suspend open registration or any workflow that grants Contributor access without review. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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