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Membership Software WishList Member CVE-2026-25445

| EUVD-2026-13083 HIGH
Deserialization of Untrusted Data (CWE-502)
2026-03-19 audit@patchstack.com
Deserialization
8.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Re-analysis Queued
Apr 22, 2026 - 21:37 vuln.today
cvss_changed
EUVD ID Assigned
Mar 19, 2026 - 09:22 euvd
EUVD-2026-13083
Analysis Generated
Mar 19, 2026 - 09:22 vuln.today
CVE Published
Mar 19, 2026 - 09:16 nvd
HIGH 8.8

DescriptionCVE.org

Deserialization of Untrusted Data vulnerability in Membership Software WishList Member X allows Object Injection.This issue affects WishList Member X: from n/a through 3.29.0.

AnalysisAI

WishList Member X, a WordPress membership plugin, contains a deserialization of untrusted data vulnerability that allows authenticated attackers with low-level privileges to perform PHP object injection attacks. This affects all versions up to and including 3.29.0. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate as low-privilege user
Exploit
Send malicious serialized object
Execution
Trigger deserialization in WishList Member X
Impact
Execute arbitrary code with plugin privileges
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Vulnerability AssessmentAI

Exploitation Requires authenticated user login to WishList Member X (version 3.29.0 and earlier). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H indicates network-based exploitation with low attack complexity, requiring only low-privilege authentication and no user interaction, with high impact across all CIA triad components. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker registers a low-privilege account (subscriber or member) on a WordPress site running WishList Member X version 3.29.0 or earlier. They identify an input parameter that the plugin deserializes without validation and craft a malicious serialized PHP object containing a POP (Property-Oriented Programming) chain that leverages existing classes in WordPress or the plugin to execute arbitrary code. …
Remediation Immediately upgrade WishList Member X to a version newer than 3.29.0 that addresses this deserialization vulnerability. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Audit all WordPress installations for WishList Member X versions ≤3.29.0 and document affected sites. …

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CVE-2026-25445 vulnerability details – vuln.today
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