XSS in Nosilver4u Ewww Image Optimizer
CVE-2026-92826
The EWWW Image Optimizer plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via REQUEST_URI Parameter Key in all versions up to, and including, 8.7.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Successful exploitation requires that the enable_help option is active, as the vulnerable HelpScout Beacon script block is only emitted when that setting is enabled.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/a9295e78-b45d-4738-b14e-1a16d…
- plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/bulk.php
- plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/bulk.php
- plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/clas…
- plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/clas…
- plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/clas…
- plugins.trac.wordpress.org/browser/ewww-image-optimizer
- plugins.trac.wordpress.org/changeset/3712144/ewww-image-optimizer/trunk/classes…
Frequently asked questions
- What is CVE-2026-92826?
- CVE-2026-92826 is a medium-severity vulnerability in Nosilver4u Ewww Image Optimizer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-03.
- How severe is CVE-2026-92826?
- Medium severity. CVSS v3 base score is 6.1 out of 10.