CVE-2024-54440Network attack vector

Stored XSS via missing nonce validation

Published Dec 16, 2024 · Updated Apr 28, 2026

Cross-site request forgery in blueskyy WP-Ban-User 1.0 and earlier allows remote attackers to inject stored scripts via forged requests. A settings-update function lacks valid WordPress nonce verification and accepts attacker-supplied script content for persistent storage. Exploitation requires a logged-in site administrator to click a malicious link or otherwise submit the forged request, causing the payload to be stored through the administrator's session.

CVSS severity7.1
High
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

Cross-site request forgery in blueskyy WP-Ban-User 1.0 and earlier allows remote attackers to inject stored scripts via forged requests. A settings-update function lacks valid WordPress nonce verification and accepts attacker-supplied script content for persistent storage. Exploitation requires a logged-in site administrator to click a malicious link or otherwise submit the forged request, causing the payload to be stored through the administrator's session.

The record

CVE
CVE-2024-54440
Published
Dec 16, 2024
Updated
Apr 28, 2026
Vendor
blueskyy
Product
WP-Ban-User
Classifications
CWE-352, CAPEC-592, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2024CVE 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=0 <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

blueskyy · WP-Ban-Userversion=0 <=1.0

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-592Stored XSS
T1190Exploit Public-Facing Application

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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