wpdevteam Gutenberg Essential Blocks Plugin up to 6.1.4 on WordPress Block Attribute cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k1.23

Summaryinfo

A vulnerability identified as problematic has been detected in wpdevteam Gutenberg Essential Blocks Plugin up to 6.1.4 on WordPress. This issue affects some unknown processing of the component Block Attribute Handler. Performing a manipulation results in cross site scripting. This vulnerability is identified as CVE-2026-10833. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in wpdevteam Gutenberg Essential Blocks Plugin up to 6.1.4 on WordPress. It has been classified as problematic. This affects some unknown functionality of the component Block Attribute Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

The Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'configurablePrefix' Block Attribute in all versions up to, and including, 6.1.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The weakness was released by Viet Anh Ngo. The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-10833 since 06/04/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 6.1.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-39164). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.4
CNA Vector (Wordfence): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Gutenberg Essential Blocks Plugin 6.1.4

Timelineinfo

06/04/2026 CVE reserved
06/25/2026 +21 days Advisory disclosed
06/25/2026 +0 days VulDB entry created
06/25/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: wordfence.com
Researcher: Viet Anh Ngo
Status: Confirmed

CVE: CVE-2026-10833 (🔒)
GCVE (CVE): GCVE-0-2026-10833
GCVE (VulDB): GCVE-100-373641
EUVD: 🔒

Entryinfo

Created: 06/25/2026 06:33
Updated: 06/25/2026 07:44
Changes: 06/25/2026 06:33 (67), 06/25/2026 07:44 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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