CVE-2024-2123Network attack vector

Unauthenticated stored XSS via unescaped display names

Published Mar 13, 2024 · Updated Apr 8, 2026

Stored cross-site scripting in Ultimate Member 2.8.3 and earlier allows remote attackers to inject scripts through registration display names. The member-directory data builder copies display_name into list and grid Underscore templates that use unescaped interpolation without sanitizing or escaping the value. Public registration and a member-directory view are required; the stored script then executes in the viewing user's browser and can act within that session.

CVSS severity7.2
High
EPSS probability26.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Ultimate Member 2.8.3 and earlier allows remote attackers to inject scripts through registration display names. The member-directory data builder copies display_name into list and grid Underscore templates that use unescaped interpolation without sanitizing or escaping the value. Public registration and a member-directory view are required; the stored script then executes in the viewing user's browser and can act within that session.

The record

CVE
CVE-2024-2123
Published
Mar 13, 2024
Updated
Apr 8, 2026
Vendor
Ultimate Member Group Ltd
Product
Ultimate Member
Classifications
CWE-79, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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=0 <=2.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ultimate Member Group Ltd · Ultimate Memberversion=0 <=2.8.3

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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