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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
nosilver4u:ewww image optimizer
References 8
https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/bulk…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/bulk…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/clas…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/clas…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/clas…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/ewww-image-optimizer?rev=3712144
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3712144/ewww-image-optimizer/trunk…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/a9295e78-b45d-4738-b1…
security@wordfence.com