CVE-2023-4254Public exploitNetwork attack vector

Stored XSS via unescaped FAQ welcome text

Published Sep 4, 2023 · Updated Apr 23, 2025

Stored XSS in QuantumCloud WPBot before 4.7.8 allows remote authenticated users with administrator access to execute script in visitors' browsers. The FAQ language setting saves the Welcome to FAQ Section value without sanitizing or escaping it, then renders the value on the public FAQ frontend. An administrator must store the payload, and a visitor must open the FAQ; multisite remains exposed when unfiltered_html is disabled.

CVSS severity4.8
Medium
EPSS probability0.48%
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 QuantumCloud WPBot before 4.7.8 allows remote authenticated users with administrator access to execute script in visitors' browsers. The FAQ language setting saves the Welcome to FAQ Section value without sanitizing or escaping it, then renders the value on the public FAQ frontend. An administrator must store the payload, and a visitor must open the FAQ; multisite remains exposed when unfiltered_html is disabled.

The record

CVE
CVE-2023-4254
Published
Sep 4, 2023
Updated
Apr 23, 2025
Vendor
QuantumCloud
Product
WPBot
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=0 <4.7.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

QuantumCloud · WPBotversion=0 <4.7.8

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1059.007Command and Scripting Interpreter: JavaScript/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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