CVE-2025-43766
Published: 23 August 2025
Summary
CVE-2025-43766 is a medium-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Liferay Digital Experience Platform. Its CVSS base score is 6.8 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 45.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-43766 is an unrestricted file upload vulnerability in the style books component of Liferay Portal versions 7.4.0 through 7.3.3.131, as well as Liferay DXP versions 2024.Q4.0, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.12, and 7.4 GA through update 92. The issue allows attackers to upload files that are processed within the environment, resulting in arbitrary code execution. It carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) and maps to CWE-434 (Unrestricted Upload of File with Dangerous Type).
Unauthenticated remote attackers can exploit this vulnerability over the network with low attack complexity and no user interaction required. Successful exploitation enables full arbitrary code execution on the affected Liferay instance, potentially compromising confidentiality, integrity, and availability with high impact.
The official Liferay security advisory provides details on mitigation and patches at https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-43766. Security practitioners should consult this reference for upgrade paths and remediation steps specific to affected versions.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-25729
Vulnerability details
The Liferay Portal 7.4.0 through 7.3.3.131, and Liferay DXP 2024.Q4.0, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.12 and 7.4 GA through update 92 allows the upload of unrestricted files in the style books component that are processed within…
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the environment enabling arbitrary code execution by attackers.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload in public-facing Liferay web app directly enables remote unauthenticated exploitation (T1190) resulting in arbitrary code execution via deployed web shell (T1505.003).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires timely remediation of the unrestricted file upload flaw through vendor patches, directly preventing arbitrary code execution in Liferay's style books component.
Mandates validation of uploaded files to block dangerous types from being processed within the environment, addressing the core unrestricted upload vulnerability.
Deploys malicious code protection at system entry points to scan and eradicate uploaded files containing executable code before processing.