nosilver4u EWWW Image Optimizer Plugin up to 8.7.7 on WordPress HelpScout Beacon REQUEST_URI cross site scripting

Summaryinfo

A vulnerability was found in nosilver4u EWWW Image Optimizer Plugin up to 8.7.7. It has been classified as problematic. Affected by this issue is some unknown functionality of the component HelpScout Beacon. Performing a manipulation of the argument REQUEST_URI results in cross site scripting. This vulnerability is identified as CVE-2026-92826. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in nosilver4u EWWW Image Optimizer Plugin up to 8.7.7. This affects an unknown code block of the component HelpScout Beacon. The manipulation of the argument REQUEST_URI with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE 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.

It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-92826 since 09/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• nosilver4u

Name

• EWWW Image Optimizer Plugin

Version

• 8.7.0
• 8.7.1
• 8.7.2
• 8.7.3
• 8.7.4
• 8.7.5
• 8.7.6
• 8.7.7

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
• 🔒

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