CVE-2026-111737lowCWE-79

CVE-2026-111737: low-severity vulnerability in Speed Optimizer

Speed Optimizer < 7.8.5 - Admin+ Stored XSS via DNS Prefetch and Font Preload URL Lists

Published

Follow this CVE+ Monitor Speed Optimizer

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

28Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 3.5epss 0.2%
The Speed Optimizer WordPress plugin before 7.8.5 does not sanitise or escape some of its settings before outputting them in the head of front-end pages, which could allow high-privilege users such as admins to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in a multisite setup).
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
Affected products
Unknown · Speed Optimizer
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Speed Optimizer

In the same product, most dangerous first.

CVE-2026-3220HIGHMultiple Plugins - Unauthenticated Stored XSS via Minify LibraryEPSS 0.3%CVE-2026-111738MEDIUMSpeed Optimizer < 7.8.5 - Admin+ Network Option Update via enable-option/disable-optionEPSS 0.3%