CVE-2025-4599Public exploitNetwork attack vector

Administrator-session script execution via unchecked postMessage

Published Aug 4, 2025 · Updated Aug 5, 2025

PostMessage XSS in Liferay Portal and DXP fragment preview allows remote attackers to execute JavaScript in an administrator's session. The handleIframeMessage handler accepts messages from any origin and assigns message data to the portlet-body element as HTML without validation. Exploitation requires an authenticated administrator to open the crafted preview page, allowing attacker script to act in that browser session.

CVSS severity2.0
Low
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PostMessage XSS in Liferay Portal and DXP fragment preview allows remote attackers to execute JavaScript in an administrator's session. The handleIframeMessage handler accepts messages from any origin and assigns message data to the portlet-body element as HTML without validation. Exploitation requires an authenticated administrator to open the crafted preview page, allowing attacker script to act in that browser session.

The record

CVE
CVE-2025-4599
Published
Aug 4, 2025
Updated
Aug 5, 2025
Vendor
Liferay
Product
Liferay Portal
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.4.0 <=7.4.3.132

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Liferay · Liferay Portalversion=7.4.0 <=7.4.3.132
Liferay · Liferay DXPversion=2024.Q1.1 <=2024.Q1.13; version=2024.Q2.0 <=2024.Q2.13; version=2024.Q3.0 <=2024.Q3.13; version=2024.Q4.0 <=2024.Q4.5; version=7.4.13-u61 <=7.4.13-u92

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.0LiferayCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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