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CVE-2026-9066

MEDIUM 6.1 CVSS 3.1
Published
July 23, 2026
Last modified
July 23, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

The WP Compress WordPress plugin before 7.10.04 does not validate the value of a query parameter that controls the asset CDN host before using it to build the URLs of JavaScript files emitted on the page, leading to Reflected XSS. When a visitor follows a crafted link, the WP Compress WordPress plugin before 7.10.04's loader injects script elements pointing to an attacker-controlled origin, which lets the attacker execute arbitrary JavaScript in the visitor's session on the target site.

Affected WordPress components

  • WP Compress – Instant Performance & Speed Optimization Plugin · wp-compress-image-optimizer
    Confirmed match Active
    Before 7.10.04
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown WP Compress — Before 7.10.04

References

  • wpscan.com https://wpscan.com/vulnerability/133e2ca0-8cde-4b59-b680-0ddf95004625/
  • nvd.nist.gov Official NVD record