What is CVE-2026-111737?

CVE-2026-111737 is a low-severity vulnerability in Speed Optimizer, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-10-23.

How severe is CVE-2026-111737?

Low severity. CVSS v3 base score is 3.5 out of 10.

XSS in Speed Optimizer

CVE-2026-111737

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).

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-23 · last modified 2026-10-23.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Speed Optimizer

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

wpscan.com/vulnerability/308b6173-139d-4940-869d-c9ff1e83c323/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-111737?: CVE-2026-111737 is a low-severity vulnerability in Speed Optimizer, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-10-23.
How severe is CVE-2026-111737?: Low severity. CVSS v3 base score is 3.5 out of 10.