The Compress plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in versions up to, and including, 6.60.28. This makes it possible for unauthenticated attackers to perform an unauthorized action.
CVE-2026-25370 is a medium severity with CVSS 5.3 Vulnerability issue affecting the Plugin WP Compress – Instant Performance & Speed Optimization. It affects Versions up to 6.60.28 and is fixed in 6.60.29.
CVE-2026-25370 is tracked for the Plugin WP Compress – Instant Performance & Speed Optimization as medium severity with CVSS 5.3. The affected range is Versions up to 6.60.28. Update WP Compress – Instant Performance & Speed Optimization to 6.60.29 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
wp-compress-image-optimizer
View on wordpress.org
|
| CVE | CVE-2026-25370 |
| Patched Versions |
6.60.29
|
| Affected Versions |
Versions up to 6.60.28
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
WP Compress – Image Optimizer [All-In-One] <= 6.10.33 - Unauthenticated Directory Traversal via css
WP Compress <= 6.30.15 - Authenticated (Subscriber+) Missing Authorization via Multiple Functions
WP Compress – Image Optimizer <= 6.11.08 - Missing Authorization to Unauthenticated CDN Modification
WP Compress <= 6.30.30 - Unauthenticated Broken Authentication
WP Compress – Image Optimizer [All-In-One] <= 6.20.01 - Missing Authorization
WP Compress – Instant Performance & Speed Optimization <= 6.30.03 - Reflected Cross-Site Scripting via custom_server Parameter
WP Compress – Image Optimizer [All-In-One] <= 6.20.13 - Reflected Cross-Site Scripting
WP Compress <= 6.30.15 - Unauthenticated Server-Side Request Forgery via init Function
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