# CVE-2026-94121: 10Web Booster PHP Object Injection in cache optimizer

Source: https://junglewise.ai/threats/cve-2026-94121-contributor-php-object-injection-in-10web-booster-website-speed  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-30. Updated: 2026-09-30  
License: CC BY 4.0 with a link back

CVE-2026-94121 · Severity: high · CVSS 8.8 · Published 2026-09-30

10Web Booster is a WordPress plugin that optimizes website speed and caching performance. A PHP Object Injection vulnerability in versions up to 2.33.6 allows authenticated contributors to execute arbitrary actions on the server, potentially leading to data theft, malware installation, or site takeover. The vulnerability has been patched in version 2.34.0.

Vendors: [10Web](https://junglewise.ai/threats/vendors/10web).

## Quick answers

**Is CVE-2026-94121 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-94121 being exploited in the wild.

**How severe is CVE-2026-94121?** High severity, with a CVSS score of 8.8, published 30 September 2026.

**Which products and versions are affected?** 10Web Booster – Website speed optimization, Cache & Page Speed optimizer <=2.33.6.

**Is there a fix for CVE-2026-94121?** A patch was published on 2026-09-24: patched in version 2.34.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-94121 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-94121?** Check whether you run 10Web Booster – Website speed optimization or Cache & Page Speed optimizer at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The plugin is vulnerable to PHP Object Injection (CWE-502), which allows manipulation of serialized objects to trigger unintended code execution. The vulnerability requires contributor-level privileges and is accessible through the WordPress plugin, allowing attackers to instantiate arbitrary objects and invoke methods that perform harmful server-side actions. This is fixed in version 2.34.0.

## Affected products

- 10Web Booster – Website speed optimization, Cache & Page Speed optimizer <=2.33.6

## Timeline

- 2026-09-24: disclosed
- 2026-09-24: patched: patched in version 2.34.0

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/tenweb-speed-optimizer/vulnerability/wordpress-10web-booster-website-speed-optimization-cache-page-speed-optimizer-plugin-2-33-6-php-object-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/tenweb-speed-optimizer/vulnerability/wordpress-10web-booster-website-speed-optimization-cache-page-speed-optimizer-plugin-2-33-6-php-object-injection-vulnerability?_s_id=cve)