How severe is CVE-2021-29040?

CVE-2021-29040 has a CVSS score of 5.3/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2021-29040?

CVE-2021-29040 affects the following packages: com.liferay.portal:release.portal.bom (Maven), com.liferay.portal:release.dxp.bom (Maven), com.liferay.portal:release.dxp.bom (Maven), com.liferay.portal:release.dxp.bom (Maven). Ecosystems affected: Maven.

How do I fix CVE-2021-29040?

Update com.liferay.portal:release.portal.bom to 7.3.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-29040 is resolved across your whole dependency graph.

How do I detect CVE-2021-29040 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.liferay.portal:release.portal.bom, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-29040 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2021-29040 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-29040 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-29040?

CVE-2021-29040 has an EPSS (Exploit Prediction Scoring System) score of 1.1%, placing it in the 65th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-29040?

CVE-2021-29040 is classified as CWE-209 (CWE-209). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2021-29040 published, and has it been updated?

CVE-2021-29040 was published on May 16, 2021 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2021-29040 — release.portal.bom

MEDIUM

CVE-2021-29040 is a medium-severity (CVSS 5.3) CWE-209 vulnerability in com.liferay.portal:release.portal.bom. A fix is available for com.liferay.portal:release.portal.bom — see the affected versions and patch details below.

Liferay Portal and Liferay DXP Reveals Data via Overly Verbose Error Messages

Also known asGHSA-87x7-pwrx-jch7

Published

May 16, 2021

Updated

Oct 24, 2026

Affected

4 pkgs

Patched

4 / 4

Exploits

None indexed

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs65th percentile — riskier than 65% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected

☕com.liferay.portal:release.portal.bom☕com.liferay.portal:release.dxp.bom☕com.liferay.portal:release.dxp.bom☕com.liferay.portal:release.dxp.bom

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

The JSON web services in Liferay Portal 7.3.4 and earlier, and Liferay DXP 7.0 before fix pack 97, 7.1 before fix pack 20 and 7.2 before fix pack 10 may provide overly verbose error messages, which allows remote attackers to use the contents of error messages to help launch another, more focused attacks via crafted inputs.

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`com.liferay.portal:release.portal.bom`	all versions	7.3.5`com.liferay.portal:release.portal.bom:7.3.5`
☕Maven	`com.liferay.portal:release.dxp.bom`	all versions	7.0.10.fp97`com.liferay.portal:release.dxp.bom:7.0.10.fp97`
☕Maven	`com.liferay.portal:release.dxp.bom`	≥ 7.1.0&&< 7.1.10.fp20	7.1.10.fp20`com.liferay.portal:release.dxp.bom:7.1.10.fp20`
☕Maven	`com.liferay.portal:release.dxp.bom`	≥ 7.2.0&&< 7.2.10.fp10	7.2.10.fp10`com.liferay.portal:release.dxp.bom:7.2.10.fp10`

Affected Products

2 products · 98 configurations

Application

digital experience platformliferay

< 7.0

3 versions

7.07.17.2

Application

liferay portalliferay

≤ 7.3.4

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.liferay.portal:release.portal.bom, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.liferay.portal:release.portal.bom to 7.3.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-29040 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-29040 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5.3/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE Classification

CWE-209CWE-209

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

liferay-portal

2.5/10

Code-Review0/10

Maintained10/10

Branch-Protection0/10

Assessed Nov 2, 2026

Timeline

Disclosed

May 16, 2021

Last updated

Oct 24, 2026

Identifiers

CVE-2021-29040

GHSA-87x7-pwrx-jch7

References

Advisoryportal.liferay.dev Advisorynvd.nist.gov · CVE 2021 29040 Webweb.archive.org Webliferay.com Packagegithub.com · liferay portal

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs affecting release.portal.bom are rated as high or higher (top: high).

CVE-2025-62264CVE-2025-62265CVE-2025-62257CVE-2025-62266CVE-2025-62258CVE-2025-62259CVE-2025-62260CVE-2025-62261

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026

CVE-2021-29040 — release.portal.bom

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2021-29040 in your dependencies?