CVE-2025-3526Network attack vector

Denial of service via unbounded session attributes

Published Jun 16, 2025 · Updated Jun 16, 2025

Denial of service in Liferay Portal 7.0.0 through 7.4.3.21 and affected Liferay DXP releases allows remote attackers to exhaust memory. SessionClicks.put saves attacker-controlled request keys and values as HTTP-session attributes without limiting their size or count. Unauthenticated crafted requests can grow per-session storage until the service runs out of memory and becomes unavailable.

CVSS severity8.7
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Liferay Portal 7.0.0 through 7.4.3.21 and affected Liferay DXP releases allows remote attackers to exhaust memory. SessionClicks.put saves attacker-controlled request keys and values as HTTP-session attributes without limiting their size or count. Unauthenticated crafted requests can grow per-session storage until the service runs out of memory and becomes unavailable.

The record

CVE
CVE-2025-3526
Published
Jun 16, 2025
Updated
Jun 16, 2025
Vendor
Liferay
Product
Liferay Portal
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=7.0.0 <=7.4.3.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Liferay · Liferay Portalversion=7.0.0 <=7.4.3.21
Liferay · Liferay DXPversion=6.2.0 <=portal-173; version=7.0.10 <=de-102; version=7.1.10 <=dxp-28; version=7.2.10 <=dxp-20; version=7.3.10 <=7.3.10-u25; version=7.4.13 <=7.4.13-u9

Published CVSS scores

8.7LiferayCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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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