CVE-2025-62254: The ComboServlet in Liferay Portal 7.4.0 through 7.4.3.111, and older unsupported versions, and Liferay DXP 20

This month

HIGH 7.5REMOTEDOWNGRADEUPGRADE

CVE-2025-62254 is a high-severity flaw (CVSS 7.5) affecting digital experience platform, liferay portal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The ComboServlet in Liferay Portal 7.4.0 through 7.4.3.111, and older unsupported versions, and Liferay DXP 2023.Q4.0 through 2023.Q4.2, 2023.Q3.1 through 2023.Q3.5, 7.4 GA through update 92, 7.3 GA through update 35, and older unsupported versions does not limit the number or size of the files it will combine, which allows remote attackers to create very large responses that lead to a denial of service attack via the URL query string.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-10-23
Last modified	2026-10-18

Publisher (CNA): Liferay Inc. · Vendor: liferay

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-23 23:15 UTCPublished CVE record published
2026-10-18 21:10 UTCUpdated Record last modified

liferay digital experience platform DOWNGRADE

Affected: 7.3 · 7.3 fix_pack_1 · 7.3 fix_pack_2 · 7.3 service_pack_1 · 7.3 service_pack_2 · 7.3 service_pack_3 · 7.3 update1 · 7.3 update10

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.3

1. Check installed version

apt-cache policy digital-experience-platform || rpm -q digital-experience-platform || digital-experience-platform --version

2. No fixed release: DOWNGRADE to a release before 7.3 (Debian / Ubuntu)

apt-cache madison digital-experience-platform sudo apt install digital-experience-platform=<VERSION_BEFORE_7.3> sudo apt-mark hold digital-experience-platform

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list digital-experience-platform sudo dnf downgrade digital-experience-platform-<VERSION_BEFORE_7.3> sudo dnf versionlock add digital-experience-platform

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

liferay liferay portal UPGRADE

Affected: >= 7.4.0 and <= 7.4.3.111

Fixed in: newer than 7.4.3.111

Safe to downgrade to: a release before 7.4.0

1. Check installed version

apt-cache policy liferay-portal || rpm -q liferay-portal || liferay-portal --version

2. UPGRADE to newer than 7.4.3.111 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade liferay-portal

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade liferay-portal

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.4.0 (Debian / Ubuntu)

apt-cache madison liferay-portal sudo apt install liferay-portal=<VERSION_BEFORE_7.4.0> sudo apt-mark hold liferay-portal

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list liferay-portal sudo dnf downgrade liferay-portal-<VERSION_BEFORE_7.4.0> sudo dnf versionlock add liferay-portal

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-62254?

digital experience platform: downgrade or apply the listed mitigation; liferay portal: upgrade to newer than 7.4.3.111. Exact commands for each OS are on this page.

Is CVE-2025-62254 being exploited?

CVE-2025-62254 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-62254 affect?

CVE-2025-62254 affects digital experience platform, liferay portal. Severity is high (CVSS 7.5). The ComboServlet in Liferay Portal 7.4.0 through 7.4.3.111, and older unsupported versions, and Liferay DXP 2023.Q4.0 through 2023.Q4.2, 2023.Q3.1 through 2023.Q3.5, 7.4 GA through update 92, 7.3 GA through update 35, and older unsupported

How urgent is CVE-2025-62254?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Software pages

Liferay vulnerabilities

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References

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