CVE-2022-2473Public exploitNetwork attack vector

Admin-level stored XSS via browsing-page template

Published Sep 6, 2022 · Updated Apr 8, 2026

Stored XSS in WP-UserOnline 2.87.6 and earlier allows remote authenticated users with administrative access to execute scripts in visitors' browsers. The templates[browsingpage][text] setting accepts script-bearing input without sufficient sanitization and later renders it without adequate output escaping. The condition is reachable only on multisite installations or installations with unfiltered_html disabled, and the stored script runs when a user opens an affected page.

CVSS severity5.5
Medium
EPSS probability1.42%
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 WP-UserOnline 2.87.6 and earlier allows remote authenticated users with administrative access to execute scripts in visitors' browsers. The templates[browsingpage][text] setting accepts script-bearing input without sufficient sanitization and later renders it without adequate output escaping. The condition is reachable only on multisite installations or installations with unfiltered_html disabled, and the stored script runs when a user opens an affected page.

The record

CVE
CVE-2022-2473
Published
Sep 6, 2022
Updated
Apr 8, 2026
Vendor
Lester 'GaMerZ' Chan
Product
WP-UserOnline
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 6, 2022CVE 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 <=2.87.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Lester 'GaMerZ' Chan · WP-UserOnlineversion=0 <=2.87.6

Published CVSS scores

5.5WordfenceCVSS:3.1/AV:N/AC:L/PR:H/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

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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