WordPress plugin
W3 Total Cache <= 0.9.7.3 — Improper Input Validation via openssl_verify
b002d1a1-a536-4865-b263-594390941ed4Published · Updated Action summary
Affected: ≤0.9.7.3Update to 0.9.7.4 or newer
All remediation steps- Severity
- Medium4.3
- CVSS
- 4.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-20 Improper Input Validation
- 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≤ 0.9.7.3
- Patched in0.9.7.4
Update to 0.9.7.4 or newer.
You are affected if you run ≤ 0.9.7.3. Version 0.9.7.4 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 0.9.7.4, 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.
W3 Total Cache in versions 0.5 up to 0.9.7.3 does not sufficiently validate the "openssl_verify" result in "/services/MessageValidator/MessageValidator.php". A remote attacker can create a specially crafted certificate and bypass cryptographic checks.
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
Timeline
CVE published
Severity medium, CVSS 4.3
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- 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.