CVE-2025-47479

WP Compress <= 6.30.30 - Unauthenticated Broken Authentication

2025-07-03 00:00

Strategic Overview

Status: Patched in 6.30.31
Affected Plugin: WP Compress – Instant Performance & Speed Optimization
Affected Version: <= 6.30.30
CVSS: 7.3High
Weakness type: CWE-287 · Improper Authentication
CVE: CVE-2025-47479

View all WP Compress – Instant Performance & Speed Optimization vulnerabilities

At a glance

CVE-2025-47479 is a high-severity Improper Authentication vulnerability in the WP Compress WordPress plugin, affecting versions <= 6.30.30. It carries a CVSS score of 7.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 6.30.31; sites on affected versions should update now. Disclosed July 2025, reported by Trương Hữu Phúc (truonghuuphuc).

Vulnerability Overview

The WP Compress – Instant Performance & Speed Optimization plugin for WordPress is vulnerable to broken authentication in all versions up to, and including, 6.30.30. This makes it possible for unauthenticated attackers to access functionality they should not have access to.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-287: Improper Authentication

Reaching this weakness in WP Compress <= 6.30.30 takes no account at all. Improper authentication means the mechanism that proves who a caller is can be satisfied without the secret it was supposed to require.

An attacker authenticates as another user — administrators included — without ever knowing a password, so password policies and login rate limits never come into play. For WP Compress the fix is 6.30.31: builds <= 6.30.30 are affected, anything from 6.30.31 onward is not.

Remediation

Update to version 6.30.31, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: WP Compress 6.30.31 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-47479 https://www.wordfence.com/threat-intel/vulnerabilities/id/facb9fd5-86e7-4dc1-affc-eae7aeae5631 https://nvd.nist.gov/vuln/detail/CVE-2025-47479

Related records

Other vulnerabilities in WP Compress – Instant Performance & Speed Optimization

CVSS Vector

7.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityLow

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