EUVD-2026-62384
GHSA-r5mm-45xf-59fx
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network-reachable customer endpoint (AV:N/AC:L/PR:N/UI:N) with deserialization enabling code execution justifies high C/I/A; scope unchanged within the PHP application.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Customer PHP Object Injection in Flexible Subscriptions <= 1.8.1 versions.
Articles & Coverage 1
AnalysisAI
Unauthenticated PHP object injection in the WP Desk Flexible Subscriptions WordPress plugin (versions <= 1.8.1) lets remote attackers submit crafted serialized data that the plugin deserializes, enabling exploitation of PHP object magic methods. Reported by Patchstack and rated CVSS 9.8, the flaw can escalate to remote code execution, data theft, or site takeover when a suitable POP gadget chain is present in the plugin, WordPress core, or another installed extension. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Flexible Subscriptions plugin (version <= 1.8.1) must be installed and active on a network-reachable WordPress site, and the attacker must reach the customer-facing subscription function that deserializes untrusted input - per CVSS PR:N/UI:N this requires no authentication and no user interaction against a default install. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are mixed and warrant honest weighing. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker sends a crafted HTTP request to a customer-reachable Flexible Subscriptions endpoint containing a serialized PHP object payload. The plugin deserializes it, instantiating attacker-chosen objects whose magic methods trigger a POP gadget chain, allowing file writes or code execution and ultimately site compromise. … |
| Remediation | No vendor-released patch version was identified in the provided data; because 1.8.1 and earlier are affected, upgrade to the next release published by WP Desk above 1.8.1 once confirmed via the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/flexible-subscriptions/vulnerability/wordpress-flexible-subscriptions-plugin-1-8-1-php-object-injection-vulnerability) and the plugin changelog - do not assume a version number that is not published. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, immediately deactivate and remove the WP Desk Flexible Subscriptions plugin from all affected WordPress instances (versions ≤ 1.8.1) to prevent active exploitation. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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