What is the CVSS score of CVE-2025-43764?

CVE-2025-43764 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:H/SC:L/SI:L/SA:N. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2025-43764?

Within 30 days: Identify affected systems running Liferay Portal 7.4.0 and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Liferay Portal CVE-2025-43764

MEDIUM

Inefficient Regular Expression Complexity (ReDoS) (CWE-1333)

2025-08-23 security@liferay.com

Denial Of Service Digital Experience Platform Liferay Portal Liferay

6.9

CVSS 4.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-1333 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V2 - Validation and Business Logic Regex complexity limits MITRE ATT&CK 1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.9 (MEDIUM). Attack characteristics: network attack vector, low complexity, high privileges required, user interaction required. EPSS exploitation probability: 0.10%.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

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

Self-ReDoS (Regular expression Denial of Service) exists with Role Name search field of Kaleo Designer portlet JavaScript in Liferay Portal 7.4.0 through 7.4.3.131, and Liferay DXP 2024.Q4.0 through. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

maven com.liferay:com.liferay.portal.workflow.kaleo.designer.web fix: 5.0.145

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 under CWE-1333. Self-ReDoS (Regular expression Denial of Service) exists with Role Name search field of Kaleo Designer portlet JavaScript in Liferay Portal 7.4.0 through 7.4.3.131, and Liferay DXP 2024.Q4.0 through 2024.Q4.1, 2024.Q3.0 through 2024.Q3.13, 2024.Q2.1 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.20 and 7.4 GA through update 92, which allows authenticated users with permissions to update Kaleo Workflows to enter a malicious Regex pattern causing their browser to hang for a very long time. Affected products include: Liferay Digital Experience Platform, Liferay Liferay Portal. Version information: through 7.4.3.131.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.9 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

High

User Interaction

Passive

Vulnerable system: Confidentiality

Low

Vulnerable system: Integrity

Low

Vulnerable system: Availability

High

Subsequent system: Confidentiality

Low

Subsequent system: Integrity

Low

Subsequent system: Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

CVE Published

Aug 23, 2025 - 05:15 nvd

MEDIUM 6.9

DescriptionCVE.org

Self-ReDoS (Regular expression Denial of Service) exists with Role Name search field of Kaleo Designer portlet JavaScript in Liferay Portal 7.4.0 through 7.4.3.131, and Liferay DXP 2024.Q4.0 through 2024.Q4.1, 2024.Q3.0 through 2024.Q3.13, 2024.Q2.1 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.20 and 7.4 GA through update 92, which allows authenticated users with permissions to update Kaleo Workflows to enter a malicious Regex pattern causing their browser to hang for a very long time.

Executive ViewAI

Why It Matters

Organizations using Liferay Portal 7.4.0 should be aware of notable risk from CVE-2025-43764 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 72% exploitable

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-2025-43764

Search Externally

GitHub PoC

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