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Liferay Portal and Liferay DXP Fails to Invalidate CAPTCHA Answers After Use

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated May 14, 2025

Package

maven com.liferay.portal:release.dxp.bom (Maven)

Affected versions

< 7.3.10.fp1

Patched versions

7.3.10.fp1
maven com.liferay.portal:release.portal.bom (Maven)
>= 7.3.4, < 7.3.6
7.3.6

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.

References

Published by the National Vulnerability Database May 16, 2021
Published to the GitHub Advisory Database May 24, 2022
Reviewed May 14, 2025
Last updated May 14, 2025

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(44th percentile)

Weaknesses

CVE ID

CVE-2021-29047

GHSA ID

GHSA-9mxg-p873-6793

Source code

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