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WP Meteor Website Speed Optimization Addon <= 3.4.18 — Unauthenticated Stored Cross-Site Scripting via Comment Author Name

CVE-2026-96572Published · Updated

Action summary

Affected: ≤3.4.18Update to 3.4.19 or newer

All remediation steps
Watch plugin
Severity
High7.2
CVSS
7.2
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
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:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-79 Cross-Site Scripting
Required access
No account needed
Exploit prediction (EPSS)
0.2% chance in 30 days15th percentile
CISA KEV
Not listed
On this page8

Am I affected?

WP Meteor Website Speed Optimization Addon wp-meteor

  1. Affected≤ 3.4.18
  2. Patched in3.4.19

Update to 3.4.19 or newer.

You are affected if you run ≤ 3.4.18. Version 3.4.19 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 Meteor Website Speed Optimization Addon.
  • 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 3.4.19, 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 Meteor Website Speed Optimization Addon to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to theviper17y.

The WP Meteor Website Speed Optimization Addon plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author Name in all versions up to, and including, 3.4.18 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is delivered via the comment author name field, which must clear WordPress's comment moderation workflow before being displayed, though this represents a display prerequisite rather than any sanitization control.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in WP Meteor Website Speed Optimization Addon

All 5
More vulnerabilities in WP Meteor Website Speed Optimization Addon
SeverityVulnerabilityCVEPublished
Medium6.1Unauthenticated Stored Cross-Site Scripting via Comment
≤3.4.16Update to 3.4.17
CVE-2026-2902
Medium5.3Unauthenticated Full Path Disclosure
≤3.4.3Update to 3.4.4
CVE-2024-6553
Medium4.3WP Meteor Page Speed Optimization Topping <= 3.1.4 -Missing Authorization to Notice Dismissal
≤3.1.4Update to 3.1.5
—
Medium4.3Cross-Site Request Forgery via processAjaxNoticeDismiss
≤3.1.4Update to 3.1.5
CVE-2023-26543

Same weakness (Cross-Site Scripting)

All Cross-Site Scripting
Other Cross-Site Scripting vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 7.2

  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.
EPSS
Exploit Prediction Scoring System by FIRST.org.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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