ckp267 MaxiBlocks Builder Plugin up to 2.1.9 on WordPress REST API Endpoint style-card sc_styles cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in ckp267 MaxiBlocks Builder Plugin up to 2.1.9 on WordPress. This vulnerability affects unknown code of the file /wp-json/maxi-blocks/v1.0/style-card of the component REST API Endpoint. The manipulation of the argument sc_styles results in cross site scripting. This vulnerability is reported as CVE-2026-6378. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in ckp267 MaxiBlocks Builder Plugin up to 2.1.9 on WordPress. Affected is an unknown code block of the file /wp-json/maxi-blocks/v1.0/style-card of the component REST API Endpoint. The manipulation of the argument sc_styles 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. CVE summarizes:

The Maxi Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `/wp-json/maxi-blocks/v1.0/style-card` REST API endpoint in all versions up to, and including, 2.1.9 due to insufficient input sanitization and output escaping of the `sc_styles` parameter. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts that execute on every page where the plugin's style card styles are loaded, including across the entire WordPress admin panel.

The weakness was disclosed by Athiwat Tiprasaharn. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-6378 since 04/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 2.1.10 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-26728). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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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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: MaxiBlocks Builder Plugin 2.1.10
Patch: github.com

Timelineinfo

04/15/2026 CVE reserved
05/02/2026 +17 days Advisory disclosed
05/02/2026 +0 days VulDB entry created
05/02/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: wordfence.com
Researcher: Athiwat Tiprasaharn
Status: Confirmed

CVE: CVE-2026-6378 (🔒)
GCVE (CVE): GCVE-0-2026-6378
GCVE (VulDB): GCVE-100-360792
EUVD: 🔒

Entryinfo

Created: 05/02/2026 07:05
Updated: 05/02/2026 07:14
Changes: 05/02/2026 07:05 (70), 05/02/2026 07:14 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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