CVE-2026-107742
Received Received - Intake

Stored XSS in 10Web Booster WordPress Plugin

Publication date: 2026-10-10

Last updated on: 2026-10-10

Assigner: Wordfence

Description
The 10Web Booster – Website speed optimization, Cache & Page Speed optimizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'author' parameter in all versions up to, and including, 2.34.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable because a comment author Name value containing ' src=' and an event-handler payload contains no HTML tags or quote characters, allowing it to survive WordPress core's sanitize_text_field and land verbatim inside the alt attribute, where the plugin's own str_replace subsequently injects the single quote that breaks out of the attribute context.

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Meta Information

Published
2026-10-10
Last Modified
2026-10-10
Generated
2026-10-10
AI Q&A
2026-10-10
EPSS Evaluated
N/A
NVD
CVE-2026-107742
EUVD
EUVD-2026-96210

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizer 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the 10Web Booster WordPress plugin. It allows unauthenticated attackers to inject malicious scripts via the 'author' parameter due to insufficient input sanitization and output escaping. The injected scripts execute when users access affected pages.

Detection Guidance

Check WordPress sites using the 10Web Booster plugin for comments with malicious payloads in the author field. Inspect HTML source for injected scripts or unusual alt attributes. Use Wordfence or similar security plugins to scan for stored XSS patterns.

Impact Analysis

An attacker could steal user sessions, deface websites, or redirect visitors to malicious sites. Users with admin access could be targeted to escalate privileges. The impact depends on user interactions with the compromised pages.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality requirements. For HIPAA, it may expose protected health information, risking compliance with security rules.

Mitigation Strategies

Update the 10Web Booster plugin to the latest version. Disable the plugin temporarily if an update is unavailable. Review and remove suspicious comments. Implement a web application firewall to block XSS attempts.

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