CVE-2021-29047

Name: CVE-2021-29047
Creator: NVD / NIST
Published: 2021-05-16T16:15:07.297+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.07%

Last modified Jun 17, 2026

CVE-2021-29047 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.07% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.07%

60.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Liferay	Dxp	< 7.3
Liferay	Dxp	7.3
Liferay	Liferay Portal	7.3.4
Liferay	Liferay Portal	7.3.5

References

http://liferay.comVendor Advisory
https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/120743467Vendor Advisory
http://liferay.comVendor Advisory
https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/120743467Vendor Advisory

Timeline

Published: May 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29047?

How severe is CVE-2021-29047?

CVE-2021-29047 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29047?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-29047?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST