Description
The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author Name in all versions up to, and including, 2.10.3 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. This vulnerability is only exploitable when the Lazy Load Images feature of W3 Total Cache is enabled, as the unsafe re-emission occurs exclusively within the LazyLoad mutator's img tag rewriting step.
Published: 2026-08-14
Score: 7.2 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 14 Aug 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 14 Aug 2026 04:45:00 +0000

Type Values Removed Values Added
First Time appeared Boldgrid
Boldgrid w3 Total Cache
Wordpress
Wordpress wordpress
Vendors & Products Boldgrid
Boldgrid w3 Total Cache
Wordpress
Wordpress wordpress

Fri, 14 Aug 2026 03:00:00 +0000

Type Values Removed Values Added
Description The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author Name in all versions up to, and including, 2.10.3 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. This vulnerability is only exploitable when the Lazy Load Images feature of W3 Total Cache is enabled, as the unsafe re-emission occurs exclusively within the LazyLoad mutator's img tag rewriting step.
Title W3 Total Cache <= 2.10.3 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}


Subscriptions

Boldgrid W3 Total Cache
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-08-14T10:45:23.627Z

Reserved: 2026-07-28T17:58:13.591Z

Link: CVE-2026-18109

cve-icon Vulnrichment

Updated: 2026-08-14T10:44:53.701Z

cve-icon NVD

Status : Received

Published: 2026-08-14T03:16:19.363

Modified: 2026-08-14T11:16:56.850

Link: CVE-2026-18109

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-14T04:30:17Z

Weaknesses