CVE-2026-18109— W3 Total Cache <= 2.10.3 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by CompromiseAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| boldgrid | W3 Total Cache | ≤ 2.10.3 | affected |
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-18109
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
W3 Total Cache <= 2.10.3 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| boldgrid | W3 Total Cache | 0 ~ 2.10.3 | - |
II. Public POCs for CVE-2026-18109
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-18109
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-18109 (4)
Other References for CVE-2026-18109 (1)
IV. Related Vulnerabilities
Same product: W3 Total Cache
- CVE-2026-66695
WordPress W3 Total Cache plugin <= 2.10.2 - Path Traversal v - CVE-2026-9282
W3 Total Cache <= 2.9.4 - Unauthenticated Arbitrary File Rea - CVE-2026-57623
WordPress W3 Total Cache plugin <= 2.9.4 - Arbitrary Code Ex - CVE-2026-39595
WordPress W3 Total Cache plugin <= 2.9.1 - Broken Access Con - CVE-2026-5032
W3 Total Cache <= 2.9.3 - Unauthenticated Security Token Exp
Same vendor: boldgrid
- CVE-2026-66708
WordPress Total Upkeep plugin <= 1.17.2 - Broken Access Cont - CVE-2026-66695
WordPress W3 Total Cache plugin <= 2.10.2 - Path Traversal v - CVE-2026-57428
WordPress Sprout Clients plugin <= 3.2.3 - Cross Site Script - CVE-2026-57418
WordPress Client Invoicing by Sprout Invoices plugin <= 20.8 - CVE-2026-9282
W3 Total Cache <= 2.9.4 - Unauthenticated Arbitrary File Rea
Same weakness: CWE-79
- CVE-2026-17209
IBM Db2 Mirror for i is affected by multiple vulnerabilities - CVE-2026-63361
LimeSurvey Community Edition 7.0.5+260623 - Reflected XSS in - CVE-2026-53472
Migration-planner: credentialurl validator accepts javascrip - CVE-2026-72832
Grav before 2.0.12 Stored XSS via quoted-attribute bypass - CVE-2026-72821
Grav Form Plugin before 9.1.15 Stored XSS via Radio Toggle
V. Comments for CVE-2026-18109
No comments yet