WordPress Newsletter plugin <= 9.3.3 - 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 Newsletter <= 9.3.3 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 |
|---|---|---|---|---|---|
| Stefano Lissa | Newsletter | up to 9.3.3 | — | No fix listed | CNA |
- Newsletter VendorStefano Lissa Affected up to 9.3.3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-66596
- 2026-10-03 Alias added: GHSA-wmvx-23w9-2238
More Stefano Lissa vulnerabilities
- TI-2025-41608 WordPress Newsletter plugin <= 9.0.9 - SQL Injection vulnerability CVSS 3.1HIGH 7.6
- TI-2025-36627 WordPress Include Me Plugin <= 1.3.2 - Cross Site Scripting (XSS) Vulnerability CVSS 3.1MEDIUM 5.9
Sources
- CVE-2026-66596 · CVE Program
- CVE-2026-66596 · NVD
- FIRST EPSS
- GHSA-wmvx-23w9-2238 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences