Description
The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author Name in all versions up to, and including, 3.1.15.1 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. Exploitation requires an administrator to have enabled Autoptimize's 'Lazy-load images?' option, the w3-total-cache/w3-total-cache.php file to be present on disk with the plugin disabled, a class named Minify_HTML to be loaded into scope by another plugin, and the malicious comment to be approved by a moderator before the payload renders.
Published: 2026-10-02
Score: 5.4 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Sun, 04 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Optimizingmatters
Optimizingmatters autooptimize
Wordpress-extensions
Wordpress-extensions autoptimize
Vendors & Products Optimizingmatters
Optimizingmatters autooptimize
Wordpress-extensions
Wordpress-extensions autoptimize

Sat, 03 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 02 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
Description The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author Name in all versions up to, and including, 3.1.15.1 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. Exploitation requires an administrator to have enabled Autoptimize's 'Lazy-load images?' option, the w3-total-cache/w3-total-cache.php file to be present on disk with the plugin disabled, a class named Minify_HTML to be loaded into scope by another plugin, and the malicious comment to be approved by a moderator before the payload renders.
Title Autoptimize <= 3.1.15.1 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'}


Subscriptions

Optimizingmatters Autooptimize
Wordpress-extensions Autoptimize
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-10-03T15:42:50.409Z

Reserved: 2026-08-24T16:49:16.127Z

Link: CVE-2026-78471

cve-icon Vulnrichment

Updated: 2026-10-03T15:40:48.025Z

cve-icon NVD

Status : Deferred

Published: 2026-10-02T06:16:41.240

Modified: 2026-10-03T16:16:38.587

Link: CVE-2026-78471

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-04T20:56:17Z

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')