What is CVE-2021-33990?

CVE-2021-33990 is a critical-severity vulnerability in Liferay Portal, classified under Improper Preservation of Permissions. CVSS score: 9.8/10. Published 2023-04-16.

How severe is CVE-2021-33990?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-33990 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Liferay Portal

CVE-2021-33990

Liferay Portal 6.2.5 allows Command=FileUpload&Type=File&CurrentFolder=/ requests when frmfolders.html exists. NOTE: The vendor disputes this issue because the exploit reference link only shows frmfolders.html is accessible and does not demonstrate how an unauthorized user can upload a file.

EPSS: 0.119 (95.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Liferay Liferay_portal — versions 6.2.5
N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory)
cve@mitre.org (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33990?: CVE-2021-33990 is a critical-severity vulnerability in Liferay Portal, classified under Improper Preservation of Permissions. CVSS score: 9.8/10. Published 2023-04-16.
How severe is CVE-2021-33990?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-33990 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.