What is CVE-2021-29047?

CVE-2021-29047 is a high-severity vulnerability in Liferay Dxp, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-05-16.

How severe is CVE-2021-29047?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Liferay Dxp

CVE-2021-29047

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.

Vulnerability class: Broken Authentication

Published 2021-05-16 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (63.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Liferay Dxp — versions 7.3
Liferay Portal — versions 7.3.4, 7.3.5

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)
portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5m… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-29047?: CVE-2021-29047 is a high-severity vulnerability in Liferay Dxp, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-05-16.
How severe is CVE-2021-29047?: High severity. CVSS v3 base score is 7.5 out of 10.