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Sumo Affiliates Pro CVE-2026-24989

| EUVD-2026-15607 CRITICAL
Deserialization of Untrusted Data (CWE-502)
2026-03-25 Patchstack GHSA-5c9g-mh76-8jrw
Deserialization Sumo Affiliates Pro
9.8
CVSS 3.1 · NVD
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Severity by source

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

Lifecycle Timeline

7
Re-analysis Queued
Apr 24, 2026 - 16:37 vuln.today
cvss_changed
Analysis Updated
Apr 16, 2026 - 05:48 EUVD-patch-fix
executive_summary
Re-analysis Queued
Apr 16, 2026 - 05:29 backfill_euvd_patch
patch_released
Patch available
Apr 16, 2026 - 05:29 EUVD
11.4.0
EUVD ID Assigned
Mar 25, 2026 - 16:47 euvd
EUVD-2026-15607
Analysis Generated
Mar 25, 2026 - 16:47 vuln.today
CVE Published
Mar 25, 2026 - 16:14 nvd
CRITICAL 9.8

DescriptionCVE.org

Deserialization of Untrusted Data vulnerability in FantasticPlugins SUMO Affiliates Pro affs allows Object Injection.This issue affects SUMO Affiliates Pro: from n/a through < 11.4.0.

AnalysisAI

A PHP object injection vulnerability exists in FantasticPlugins SUMO Affiliates Pro due to unsafe deserialization of untrusted data (CWE-502). This allows attackers to inject malicious serialized objects, potentially achieving remote code execution or other arbitrary actions depending on available gadget chains in the WordPress environment. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send malicious serialized object to plugin
Exploit
Trigger unsafe deserialization in SUMO Affiliates Pro
Execution
Inject arbitrary code via object manipulation
Impact
Execute code with WordPress permissions
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Vulnerability AssessmentAI

Exploitation Remote unauthenticated attacker can exploit SUMO Affiliates Pro plugin versions before 11.4.0 by sending malicious serialized PHP objects. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment While no CVSS score or EPSS metric has been officially published, the vulnerability warrants high priority based on the underlying threat model. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malicious serialized PHP object containing a gadget chain targeting common WordPress classes (e.g., via plugins like WP Migrate DB or similar popular utilities). The attacker submits this payload through an affiliate-related parameter or endpoint that is deserialized by the vulnerable plugin without proper validation. …
Remediation Immediately upgrade FantasticPlugins SUMO Affiliates Pro to version 11.4.0 or later to receive the vendor patch that addresses the object injection vulnerability. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all WordPress instances running FantasticPlugins SUMO Affiliates Pro and document current versions. …

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CVE-2026-24989 vulnerability details – vuln.today
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