CVE-2026-107742

10Web Booster <= 2.34.8 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name

2026-10-09 17:45
daroo

Strategic Overview

Status
Patched in 2.34.10
Affected Plugin
10Web Booster – Website speed optimization, Cache & Page Speed optimizer
Affected Version
<= 2.34.8
CVSS
7.2High
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2026-107742
View all 10Web Booster – Website speed optimization, Cache & Page Speed optimizer vulnerabilities

At a glance

CVE-2026-107742 is a high-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the 10Web Booster WordPress plugin, affecting versions <= 2.34.8. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.34.10; sites on affected versions should update now. Disclosed October 2026, reported by daroo.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

10Web Booster <= 2.34.8 carries this weakness at author, and reaching it takes no account at all. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For 10Web Booster the fix is 2.34.10: builds <= 2.34.8 are affected, anything from 2.34.10 onward is not.

Remediation

Update to version 2.34.10, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: 10Web Booster 2.34.10 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-107742https://www.wordfence.com/threat-intel/vulnerabilities/id/b14945a5-c5e7-45cb-b2cc-8d1a265b6c52https://nvd.nist.gov/vuln/detail/CVE-2026-107742

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C