WordPress WPComplete plugin <= 2.9.5.6 - Cross Site Scripting (XSS) vulnerability
Priority LOW 31CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Unauthenticated Cross Site Scripting (XSS) in WPComplete <= 2.9.5.6 versions.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00251 16th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Liquid Web / StellarWP | WPComplete | up to 2.9.5.6 | — | No fix listed | CNA |
- WPComplete VendorLiquid Web / StellarWP Affected up to 2.9.5.6 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-66599
- 2026-10-03 Alias added: GHSA-phx4-j4pm-h7pj
More Liquid Web / StellarWP vulnerabilities
- TI-2026-56689 WordPress GiveWP plugin <= 4.16.7.1 - Remote Code Execution (RCE) vulnerability CVSS 3.1CRITICAL 10.0
- TI-2026-36681 WordPress The Events Calendar plugin 6.15.12-6.16.2 - SQL Injection vulnerability CVSS 3.1CRITICAL 9.3
- TI-2026-69253 PHP object injection in WordPress The Events Calendar plugin CVSS 3.1CRITICAL 9.8
- TI-2026-67823 Object injection in WordPress Advanced Post Manager plugin CVSS 3.1CRITICAL 9.8
- TI-2026-63964 WordPress GiveWP plugin <= 4.16.9 - Broken Authentication vulnerability CVSS 3.1CRITICAL 9.1
- TI-2026-83629 SQL injection in WordPress BookIt plugin CVSS 3.1CRITICAL 9.3
Sources
- CVE-2026-66599 · CVE Program
- CVE-2026-66599 · NVD
- FIRST EPSS
- GHSA-phx4-j4pm-h7pj · GitHub Advisory Database · CC BY 4.0
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