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HIGH severity

Liferay Portal and Liferay DXP Fails to Invalidate CAPTCHA Answers After UseGHSA-9mxg-p873-6793

HIGH

GHSA-9mxg-p873-6793 is a high-severity (CVSS 7.5) Improper Authentication 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.

Also known asCVE-2021-29047
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 10, 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
0.00%0.52%1.04%1.57%0.3%1.1%1.1%May 26Oct 26Nov 26

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

2 pkgs affected
☕com.liferay.portal:release.portal.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 SimpleCaptcha implementation in Liferay Portal 7.3.4, 7.3.5 and Liferay DXP 7.3 before fix pack 1 does not invalidate CAPTCHA answers after it is used, which allows remote attackers to repeatedly perform actions protected by a CAPTCHA challenge by reusing the same CAPTCHA answer.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.liferay.portal:release.portal.bom≥ 7.3.4&&< 7.3.67.3.6com.liferay.portal:release.portal.bom:7.3.6
☕Mavencom.liferay.portal:release.dxp.bomall versions7.3.10.fp1com.liferay.portal:release.dxp.bom:7.3.10.fp1

Affected Products

2 products · 4 configurations
Application
dxpliferay
< 7.3
1 version
7.3
Application
liferay portalliferay
2 versions
7.3.47.3.5

Detection & mitigation playbook

Open-source dependency

  1. 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.

  2. Fix

    Update com.liferay.portal:release.portal.bom to 7.3.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9mxg-p873-6793 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

The SimpleCaptcha implementation in Liferay Portal 7.3.4, 7.3.5 and Liferay DXP 7.3 before fix pack 1 does not invalidate CAPTCHA answers after it is used, which allows remote attackers to repeatedly perform actions protected by a CAPTCHA challenge by reusing the same CAPTCHA answer.
O3 Security · Impact-Aware SCA

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Liferay Portal and Liferay DXP Fails to Invalidate…