How severe is CVE-2021-33990?

CVE-2021-33990 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-33990 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33990?

CVE-2021-33990 affects Liferay Liferay Portal. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33990?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-33990 published?

CVE-2021-33990 was published on 2023-04-16 and last updated on 2026-06-17.

CVE-2021-33990

CVE-2021-33990 is a critical-severity vulnerability in Liferay Liferay Portal with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-281.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-281
Affected product: Liferay Liferay Portal
Published: 2023-04-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-33990?: CVE-2021-33990 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-33990 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33990?: CVE-2021-33990 affects Liferay Liferay Portal. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33990?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-33990 published?: CVE-2021-33990 was published on 2023-04-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:liferay:liferay_portal:6.2.5:*:*:*:*:*:*:*

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