CVE-2026-14287
Received Received - Intake

Cross-Site Scripting in 10Web Booster WordPress Plugin

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: WPScan

Description
The 10Web Booster WordPress plugin before 2.33.5 does not correctly validate an access token on an unauthenticated request handler and does not escape attacker-supplied stylesheet content before rendering it into the page head, allowing an unauthenticated attacker to store markup that executes as JavaScript in the browser of anonymous visitors to an affected page.

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Meta Information

Published
2026-08-19
Last Modified
2026-08-19
Generated
2026-08-19
AI Q&A
2026-08-19
EPSS Evaluated
N/A
NVD
CVE-2026-14287
EUVD
EUVD-2026-62263

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
10web booster to 2.33.5 (exc)
10web speed_optimizer to 2.33.5 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is an unauthenticated stored cross-site scripting (XSS) vulnerability in the 10Web Booster WordPress plugin before version 2.33.5. It allows an attacker to inject malicious markup that executes as JavaScript in visitors' browsers by exploiting improper access token validation and lack of sanitization of stylesheet content.

Detection Guidance

Check the installed version of the 10Web Speed Optimizer plugin in your WordPress admin panel. If it is below version 2.33.5, the vulnerability is likely present. You can also inspect the plugin files for the vulnerable request handler and unsanitized stylesheet rendering.

Impact Analysis

An unauthenticated attacker could inject malicious scripts into pages served by the vulnerable plugin. This could lead to theft of user sessions, defacement of websites, or delivery of malware to visitors. All visitors to affected pages would be at risk without requiring any user interaction.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Organizations may face compliance breaches if user data is compromised through this exploit.

Mitigation Strategies

Update the 10Web Speed Optimizer plugin to version 2.33.5 or later immediately. If updating is not possible, consider disabling the plugin temporarily until an update is applied.

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