CVE-2025-4682Network attack vector

Stored XSS via unescaped Slider and Carousel attributes

Published May 27, 2025 · Updated Apr 8, 2026

Stored XSS in WPDeveloper Essential Blocks for Gutenberg 5.4.0 and earlier allows remote authenticated users to inject scripts via block attributes. The Slider and Post Carousel frontend renderers place attacker-controlled HTML attribute values into saved page markup without adequate sanitization or output escaping. Contributor-level access is sufficient, and the stored script runs in the browser of any user who opens the injected page, enabling actions in that user's site context.

CVSS severity6.4
Medium
EPSS probability0.34%
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 WPDeveloper Essential Blocks for Gutenberg 5.4.0 and earlier allows remote authenticated users to inject scripts via block attributes. The Slider and Post Carousel frontend renderers place attacker-controlled HTML attribute values into saved page markup without adequate sanitization or output escaping. Contributor-level access is sufficient, and the stored script runs in the browser of any user who opens the injected page, enabling actions in that user's site context.

The record

CVE
CVE-2025-4682
Published
May 27, 2025
Updated
Apr 8, 2026
Vendor
ReviewX Team
Product
Essential Blocks for Gutenberg
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2025CVE 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 <=5.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ReviewX Team · Essential Blocks for Gutenbergversion=0 <=5.4.0

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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