How severe is CVE-2021-33339?

CVE-2021-33339 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-33339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33339?

CVE-2021-33339 primarily affects Liferay Digital Experience Platform. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33339?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-33339 published?

CVE-2021-33339 was published on 2021-08-04 and last updated on 2026-06-17.

CVE-2021-33339

CVE-2021-33339 is a medium-severity vulnerability in Liferay Digital Experience Platform with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Liferay Digital Experience Platform
Published: 2021-08-04
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in the Fragment module in Liferay Portal 7.2.1 through 7.3.4, and Liferay DXP 7.2 before fix pack 9 allows remote attackers to inject arbitrary web script or HTML via the _com_liferay_site_admin_web_portlet_SiteAdminPortlet_name parameter.

Frequently asked questions

What is CVE-2021-33339?: Cross-site scripting (XSS) vulnerability in the Fragment module in Liferay Portal 7.2.1 through 7.3.4, and Liferay DXP 7.2 before fix pack 9 allows remote attackers to inject arbitrary web script or HTML via the _com_liferay_site_admin_web_portlet_SiteAdminPortlet_name parameter.
How severe is CVE-2021-33339?: CVE-2021-33339 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-33339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33339?: CVE-2021-33339 primarily affects Liferay Digital Experience Platform. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33339?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33339 published?: CVE-2021-33339 was published on 2021-08-04 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:a:liferay:digital_experience_platform:7.2:-:*:*:*:*:*:*
cpe:2.3:a:liferay:digital_experience_platform:7.2:fix_pack_1:*:*:*:*:*:*
cpe:2.3:a:liferay:digital_experience_platform:7.2:fix_pack_2:*:*:*:*:*:*
cpe:2.3:a:liferay:digital_experience_platform:7.2:fix_pack_3:*:*:*:*:*:*
cpe:2.3:a:liferay:digital_experience_platform:7.2:fix_pack_4:*:*:*:*:*:*
cpe:2.3:a:liferay:digital_experience_platform:7.2:fix_pack_5:*:*:*:*:*:*
cpe:2.3:a:liferay:digital_experience_platform:7.2:fix_pack_6:*:*:*:*:*:*
cpe:2.3:a:liferay:digital_experience_platform:7.2:fix_pack_7:*:*:*:*:*:*
cpe:2.3:a:liferay:digital_experience_platform:7.2:fix_pack_8:*:*:*:*:*:*
cpe:2.3:a:liferay:liferay_portal:*:*:*:*:*:*:*:*

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