CVE-2023-23987Network attack vector

Administrator-stored script execution in another user's browser

Published Apr 6, 2023 · Updated Apr 28, 2026

Stored XSS in WPEverest User Registration 2.3.0 and earlier allows remote authenticated users to run script in another user's browser. The CNA record and linked advisory do not disclose the affected input, storage location, or rendering operation that fails to neutralize the script. Administrator access is required to store the payload, and another user must view the affected content before it executes in that user's browser context.

CVSS severity5.9
Medium
EPSS probability0.39%
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 WPEverest User Registration 2.3.0 and earlier allows remote authenticated users to run script in another user's browser. The CNA record and linked advisory do not disclose the affected input, storage location, or rendering operation that fails to neutralize the script. Administrator access is required to store the payload, and another user must view the affected content before it executes in that user's browser context.

The record

CVE
CVE-2023-23987
Published
Apr 6, 2023
Updated
Apr 28, 2026
Vendor
WPEverest
Product
User Registration & Membership
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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=n/a <=2.3.0 changes=[{"at":"2.3.1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WPEverest · User Registration & Membershipversion=n/a <=2.3.0 changes=[{"at":"2.3.1","status":"unaffected"}]

Published CVSS scores

5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
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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