WP Compress Plugin up to 7.10.3 on WordPress cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in WP Compress Plugin up to 7.10.3. The impacted element is an unknown function. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2026-9066. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in WP Compress Plugin up to 7.10.3 and classified as problematic. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

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.

The advisory is shared at wpscan.com. This vulnerability is known as CVE-2026-9066 since 05/20/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 7.10.04 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-47886). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• WordPress Plugin

Name

• WP Compress Plugin

Version

• 7.10.0
• 7.10.1
• 7.10.2
• 7.10.3

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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