CVE-2021-29047 Liferay Portal and Liferay DXP Fails to Invalidate CAPTCHA Answers After Use

What is CVE-2021-29047?

CVE-2021-29047 is a high-severity vulnerability in Liferay Liferay Portal, published on 16 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-287

Which versions are affected by CVE-2021-29047?

4 open source packages ship an affected version, including com.liferay.portal:release.dxp.bom and com.liferay.portal:release.portal.bom. It affects 2 products.

Products include Liferay Dxp, Liferay Liferay Portal.

How do I fix CVE-2021-29047?

Upgrade com.liferay.portal:release.dxp.bom to 7.3.10.fp1 or later.

Is CVE-2021-29047 being exploited?

There is no known exploitation of CVE-2021-29047 in the wild and no public exploit code.

Other vulnerabilities in Liferay Liferay Portal

• CVE-2022-42120 Liferay Portal and Liferay DXP Vulnerable to SQL Injection via the Fragment Module Critical 9.8
• CVE-2022-42122 Liferay Portal and Liferay DXP Vulnerable to SQL Injection via Friendly URL Module Critical 9.8
• CVE-2023-35030 Liferay Portal and Liferay DXP Vulnerable to CSRF via the Layout Module High 8.8
• CVE-2021-29053 Liferay Portal and Liferay DXP Vulnerable to Multiple SQL Injections High 8.8
• CVE-2021-33321 Liferay Portal and Liferay DXP insecure default configuration High 7.5

All Liferay Liferay Portal vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9mxg-p873-6793.