What is the CVSS score of CVE-2025-43816?

CVE-2025-43816 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2025-43816?

Within 30 days: Identify affected systems running the headless API for StructuredContents in Liferay Portal 7. and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Liferay Portal CVE-2025-43816

MEDIUM

Memory Leak (CWE-401)

2025-09-25 security@liferay.com

Denial Of Service Digital Experience Platform Liferay Portal Liferay

6.9

CVSS 4.0 · Vendor: liferay

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Vulnerability Assessment

Weakness	CWE CWE-401 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Resource cleanup, leak prevention
Impact	CVSS score of 6.9 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. EPSS exploitation probability: 0.11%.
Exploit ScenarioDerived	A remote attacker could exhaust available memory leading to denial of service by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

A memory leak in the headless API for StructuredContents in Liferay Portal 7.4.0 through 7.4.3.119, and older unsupported versions, and Liferay DXP 2024.Q1.1 through 2024.Q1.5, 2023.Q4.0 through. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Ensure all allocated memory is properly freed. Use RAII patterns or garbage-collected languages.

Affected Packages

maven com.liferay:com.liferay.portal.vulcan.impl fix: 5.0.115

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Memory Leak (CWE-401), which allows attackers to exhaust available memory leading to denial of service. A memory leak in the headless API for StructuredContents in Liferay Portal 7.4.0 through 7.4.3.119, and older unsupported versions, and Liferay DXP 2024.Q1.1 through 2024.Q1.5, 2023.Q4.0 through 2024.Q4.10, 2023.Q3.1 through 2023.Q3.10, 7.4 GA through update 92, and older unsupported versions allows an attacker to cause server unavailability (denial of service) via repeatedly calling the API endpoint. Affected products include: Liferay Digital Experience Platform, Liferay Liferay Portal. Version information: through 7.4.3.119.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (liferay) PRIMARY 6.9 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (liferay) · only source for this CVE.

CVSS VectorVendor: liferay

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

Active

Vulnerable system: Confidentiality

None

Vulnerable system: Integrity

None

Vulnerable system: Availability

High

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

CVE Published

Sep 25, 2025 - 20:15 nvd

MEDIUM 6.9

DescriptionCVE.org

A memory leak in the headless API for StructuredContents in Liferay Portal 7.4.0 through 7.4.3.119, and older unsupported versions, and Liferay DXP 2024.Q1.1 through 2024.Q1.5, 2023.Q4.0 through 2024.Q4.10, 2023.Q3.1 through 2023.Q3.10, 7.4 GA through update 92, and older unsupported versions allows an attacker to cause server unavailability (denial of service) via repeatedly calling the API endpoint.

Executive ViewAI

Why It Matters

Organizations using the headless API for StructuredContents in Liferay Portal 7.4.0 should be aware of notable risk from CVE-2025-43816 rated CVSS 6.9. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Moderate

Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score

0.1%

Top 70% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +34

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:a:liferay:digital_experience_platform:*:*:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:-:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update1:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update10:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update11:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update12:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update13:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update14:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update15:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update16:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update17:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update18:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update19:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update2:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update20:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update21:*:*:*:*:*:*

cpe:2.3:a:liferay:digital_experience_platform:7.4:update22:*:*:*:*:*:*

+ 78 more

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References

Advisories & patches

ADVISORY https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-43816

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GitHub PoC

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