CVE-2026-92826CWE-79cross-site-scripting

CVE-2026-92826

Medium · published October 3, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
12.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00225 · 12.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-03T08:18Z
References (8)
https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/bulk.php#L462 · [email protected]https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/bulk.php#L470 · [email protected]https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/class-base.php#L269 · [email protected]https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/class-base.php#L290 · [email protected]https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/class-base.php#L305 · [email protected]https://plugins.trac.wordpress.org/browser/ewww-image-optimizer?rev=3712144 · [email protected]https://plugins.trac.wordpress.org/changeset/3712144/ewww-image-optimizer/trunk/classes/class-base.php · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/a9295e78-b45d-4738-b14e-1a16d5915920?source=cve · [email protected]
EPSS history
Timeline
  • 04 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 03 OCT 03:25Z
    EWWW Image Optimizer <= 8.7.7 - Reflected Cross-Site Scripting via REQUEST_URI Parameter Key
    cvelistv5