CVE-2024-5223Network attack vector

Stored XSS via unsanitized custom-font uploads

Published May 30, 2024 · Updated Apr 8, 2026

Stored XSS in WPXPO PostX 4.1.1 and earlier allows remote authenticated users with Author access to run scripts in visitors' browsers. The custom-font upload path in addons/custom_font/Custom_Font.php accepts insufficiently sanitized file input and later emits stored content without adequate output escaping. Author-level access is required; the payload runs when a visitor opens an injected page and can read or alter data available in that visitor's site context.

CVSS severity6.4
Medium
EPSS probability0.33%
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 WPXPO PostX 4.1.1 and earlier allows remote authenticated users with Author access to run scripts in visitors' browsers. The custom-font upload path in addons/custom_font/Custom_Font.php accepts insufficiently sanitized file input and later emits stored content without adequate output escaping. Author-level access is required; the payload runs when a visitor opens an injected page and can read or alter data available in that visitor's site context.

The record

CVE
CVE-2024-5223
Published
May 30, 2024
Updated
Apr 8, 2026
Vendor
WPXPO
Product
PostX
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 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 <=4.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WPXPO · PostXversion=0 <=4.1.1

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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