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WP Compress – Instant Performance & Speed Optimization < 7.20.01 — Unauthenticated Remote Code Execution

CVE-2026-73343Published · Updated

Action summary

Affected: <7.20.01Update to 7.20.01 or newer

All remediation steps
Watch plugin
Severity
Critical9.8
CVSS
9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-94 Improper Control of Generation of Code
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

WP Compress – Instant Performance & Speed Optimization wp-compress-image-optimizer

  1. Affected< 7.20.01
  2. Patched in7.20.01

Update to 7.20.01 or newer.

You are affected if you run < 7.20.01. Version 7.20.01 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WP Compress – Instant Performance & Speed Optimization.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 7.20.01, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch WP Compress – Instant Performance & Speed Optimization to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Charles Vosburgh.

The WP Compress – Instant Performance & Speed Optimization plugin for WordPress is vulnerable to Remote Code Execution in all versions up to 7.20.01. This is due to insufficient validation of user supplied input before it is executed. This makes it possible for unauthenticated attackers to execute arbitrary code on the server.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in WP Compress – Instant Performance & Speed Optimization

All 19
More vulnerabilities in WP Compress – Instant Performance & Speed Optimization
SeverityVulnerabilityCVEPublished
Medium4.8Unauthenticated Privilege Escalation to 'group'/'setting'/'value' Parameters on comms Endpoint
≤7.25.00Update to 7.26.00
CVE-2026-104755
Medium5.3Missing Authorization to Unauthenticated Account Linking / Site Takeover via 'force_ic_connect' and 'apikey' Parameters
≤7.22.01Update to 7.22.38
CVE-2026-120551
Medium5.3Missing Authorization to Unauthenticated Settings Update
≤7.21.28Update to 7.22.0
CVE-2026-84757
Medium6.5Cross-Site Request Forgery to Arbitrary Options Deletion
≤7.10.09Update to 7.20.01
CVE-2026-17608
Medium6.1Reflected Cross-Site Scripting
≤7.10.3Update to 7.10.04
CVE-2026-9066

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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