CVE-2026-54194: CWE-502 Deserialization of Untrusted Data in ThemeFusion Fusion Builder
CVE-2026-54194 is a critical vulnerability in ThemeFusion's Fusion Builder plugin, specifically in versions up to and including 3.15.4. It involves PHP Object Injection due to deserialization of untrusted data, classified under CWE-502. The vulnerability allows an unauthenticated attacker to execute arbitrary code with high impact on confidentiality, integrity, and availability. No official patch or remediation guidance is currently provided by the vendor.
AI Analysis
Technical Summary
This vulnerability in Fusion Builder (<= 3.15.4) arises from unsafe deserialization of untrusted data, enabling PHP Object Injection. The CVSS 3.1 score of 9.8 indicates it is remotely exploitable without privileges or user interaction, with full impact on confidentiality, integrity, and availability. No vendor advisory or patch information is available at this time, and no known exploits have been reported in the wild.
Potential Impact
Successful exploitation could lead to remote code execution, complete system compromise, and disruption of service. The vulnerability affects confidentiality, integrity, and availability at a critical level. Since it requires no privileges or user interaction, it poses a significant risk to affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting access to the vulnerable plugin, disabling it if possible, or applying other environment-specific controls to limit exposure.
CVE-2026-54194: CWE-502 Deserialization of Untrusted Data in ThemeFusion Fusion Builder
Description
CVE-2026-54194 is a critical vulnerability in ThemeFusion's Fusion Builder plugin, specifically in versions up to and including 3.15.4. It involves PHP Object Injection due to deserialization of untrusted data, classified under CWE-502. The vulnerability allows an unauthenticated attacker to execute arbitrary code with high impact on confidentiality, integrity, and availability. No official patch or remediation guidance is currently provided by the vendor.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Fusion Builder (<= 3.15.4) arises from unsafe deserialization of untrusted data, enabling PHP Object Injection. The CVSS 3.1 score of 9.8 indicates it is remotely exploitable without privileges or user interaction, with full impact on confidentiality, integrity, and availability. No vendor advisory or patch information is available at this time, and no known exploits have been reported in the wild.
Potential Impact
Successful exploitation could lead to remote code execution, complete system compromise, and disruption of service. The vulnerability affects confidentiality, integrity, and availability at a critical level. Since it requires no privileges or user interaction, it poses a significant risk to affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting access to the vulnerable plugin, disabling it if possible, or applying other environment-specific controls to limit exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Patchstack
- Date Reserved
- 2026-06-12T09:16:00.860Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a31c7a80b89be6888375f45
Added to database: 6/16/2026, 10:01:12 PM
Last enriched: 6/16/2026, 10:15:04 PM
Last updated: 6/17/2026, 12:39:29 AM
Views: 6
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