W3 Total Cache <= 2.10.3 — Unauthenticated Stored Cross-Site Scripting via Comment Author Name
CVE-2026-18109Published · Updated Action summary
Affected: ≤2.10.3Update to 2.10.4 or newer
All remediation steps- Severity
- High7.2
- CVSS
- 7.2CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
W3 Total Cache w3-total-cache
- Affected≤ 2.10.3
- Patched in2.10.4
Update to 2.10.4 or newer.
You are affected if you run ≤ 2.10.3. Version 2.10.4 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under W3 Total Cache.
- 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
- Update to version 2.10.4, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch W3 Total Cache to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to daroo.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in W3 Total Cache
All 41| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.4 | Unauthenticated Stored Cross-Site Scripting via Comment Content via Predictable Minify Placeholder ≤2.10.7Update to 2.11.0 | CVE-2026-120019 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment Content Cached as HTML after License Expiry ≤2.10.7Update to 2.11.0 | CVE-2026-111254 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤2.10.7Update to 2.11.0 | CVE-2026-114178 | |
| Medium6.5 | Authenticated (Author+) Path Traversal ≤2.10.5Update to 2.10.6 | CVE-2026-107321 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment Content ≤2.10.6Update to 2.10.7 | CVE-2026-87920 |
- Medium5.4Unauthenticated Stored Cross-Site Scripting via Comment Content via Predictable Minify Placeholder
≤2.10.7Update to 2.11.0
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment Content Cached as HTML after License Expiry
≤2.10.7Update to 2.11.0
- High7.2Unauthenticated Stored Cross-Site Scripting
≤2.10.7Update to 2.11.0
- Medium6.5Authenticated (Author+) Path Traversal
≤2.10.5Update to 2.10.6
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment Content
≤2.10.6Update to 2.10.7
Same weakness (Cross-Site Scripting)
All Cross-Site Scripting| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- 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
- 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
- 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
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity high, CVSS 7.2
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. 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.