CVE-2025-50023Network attack vector

Administrator-level stored script execution via unsanitized input

Published Jun 20, 2025 · Updated Apr 28, 2026

Stored XSS in CodePen Embed Block 1.2.0 and earlier allows remote authenticated users to inject scripts into WordPress pages. Public advisories attribute the flaw to insufficient input sanitization and output escaping but do not identify the affected field or function. Administrator-level access is required; exposure is limited to multisite deployments or sites where unfiltered_html is disabled, and injected scripts run when a user opens the affected page.

CVSS severity5.9
Medium
EPSS probability0.24%
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 CodePen Embed Block 1.2.0 and earlier allows remote authenticated users to inject scripts into WordPress pages. Public advisories attribute the flaw to insufficient input sanitization and output escaping but do not identify the affected field or function. Administrator-level access is required; exposure is limited to multisite deployments or sites where unfiltered_html is disabled, and injected scripts run when a user opens the affected page.

The record

CVE
CVE-2025-50023
Published
Jun 20, 2025
Updated
Apr 28, 2026
Vendor
CodePen
Product
CodePen Embed Block
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 20, 2025CVE 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 <=1.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

CodePen · CodePen Embed Blockversion=0 <=1.2.0

Published CVSS scores

5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
4.4WordfenceCVSS:3.1/AV:N/AC:H/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.

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')
T1059.007JavaScript

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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