medium · CVSS v3 5.3

CVE-2026-120551

The WP Compress – Instant Performance & Speed Optimization plugin for WordPress is vulnerable to authorization bypass in…

Description

The WP Compress – Instant Performance & Speed Optimization plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 7.22.01. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to link the victim site to an attacker-controlled WP Compress account, overwrite plugin settings to an aggressive live-CDN preset, and gain the shared api_key that authenticates all nopriv HMAC-gated endpoints — enabling full control over cache purging, file deletion, opcode cache invalidation, and other privileged plugin operations. This vulnerability only affects fresh installations or lite/free-mode installs where no api_key is already stored, as the sole guard fails open when the stored key is absent.

Scores

Severity
medium
CVSS v2
5
CVSS v3
5.3
CVSS v4
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EPSS
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