What is CVE-2021-33320?

CVE-2021-33320 is a medium-severity vulnerability in Liferay Digital Experience Platform, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2021-08-03.

How severe is CVE-2021-33320?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in Liferay Digital Experience Platform

CVE-2021-33320

The Flags module in Liferay Portal 7.3.1 and earlier, and Liferay DXP 7.0 before fix pack 96, 7.1 before fix pack 20, and 7.2 before fix pack 5, does not limit the rate at which content can be flagged as inappropriate, which allows remote authenticated users to spam the site administrator with emails

Published 2021-08-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.012 (66.1th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Liferay Digital Experience Platform — versions 7.0, 7.1, 7.2
Liferay Portal

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5m… (Patch, Release Notes, Vendor Advisory)
issues.liferay.com/browse/LPE-17007 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-33320?: CVE-2021-33320 is a medium-severity vulnerability in Liferay Digital Experience Platform, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2021-08-03.
How severe is CVE-2021-33320?: Medium severity. CVSS v3 base score is 4.3 out of 10.