CVE-2021-33336Network attack vector

Stored XSS via unsanitized structure name

Published Aug 4, 2021 · Updated Aug 3, 2024

Cross-site scripting in Liferay Portal Journal 7.3.0 through 7.3.3 allows remote attackers to inject arbitrary web script or HTML. The Journal add-article menu processes the _com_liferay_journal_web_portlet_JournalPortlet_name parameter without sufficient output neutralization, allowing stored script content to persist and execute when rendered. Remote authenticated users with access to article creation can trigger the issue, causing script execution in another user's browser with confidentiality and integrity impact but no service interruption.

CVSS severity5.4
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Liferay Portal Journal 7.3.0 through 7.3.3 allows remote attackers to inject arbitrary web script or HTML. The Journal add-article menu processes the _com_liferay_journal_web_portlet_JournalPortlet_name parameter without sufficient output neutralization, allowing stored script content to persist and execute when rendered. Remote authenticated users with access to article creation can trigger the issue, causing script execution in another user's browser with confidentiality and integrity impact but no service interruption.

The record

CVE
CVE-2021-33336
Published
Aug 4, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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