CVE-2025-43820Network attack vector

Stored XSS via unescaped invitee names

Published Sep 29, 2025 · Updated Sep 29, 2025

Stored XSS in Liferay Portal and DXP Calendar invitations allows remote authenticated users to inject script through profile name fields. The Calendar widget renders invited users' first, middle, and last name fields without neutralizing crafted HTML or script. Low-privileged access is required to store a crafted name, and another user's interaction with the invitation runs it in that user's browser.

CVSS severity4.8
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Liferay Portal and DXP Calendar invitations allows remote authenticated users to inject script through profile name fields. The Calendar widget renders invited users' first, middle, and last name fields without neutralizing crafted HTML or script. Low-privileged access is required to store a crafted name, and another user's interaction with the invitation runs it in that user's browser.

The record

CVE
CVE-2025-43820
Published
Sep 29, 2025
Updated
Sep 29, 2025
Vendor
Liferay
Product
Liferay Portal
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.4.3.35 <=7.4.3.110

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Liferay · Liferay Portalversion=7.4.3.35 <=7.4.3.110
Liferay · Liferay DXPversion=2023.Q3.1 <=2023.Q3.6; version=2023.Q4.0 <=2023.Q4.4; version=7.3.10-u25 <=7.3.10-u36; version=7.4.13-u35 <=7.4.13-u92

Published CVSS scores

4.8Liferay Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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')
T1059.007JavaScript/JScript

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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