What’s Vulnerable › Vulnerabilities
CVE-2026-14287: TenWeb Speed Optimizer < 2.33.5 - Unauthenticated Stored XSS via Critical CSS Token Bypass
- Severity: medium (CVSS 4.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-19 · updated 2026-10-22
- Weakness: CWE-79
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.
Affected products
- 10Web Booster – Website speed optimization, Cache & Page Speed optimizer: before 2.33.5 — fixed in 2.33.5
How to fix
Upgrade to a fixed version: 10Web Booster – Website speed optimization, Cache & Page Speed optimizer 2.33.5. Check the vendor advisory for mitigations.
References
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