WordPress ShortPixel Image Optimizer plugin <= 6.4.3 - PHP Object Injection vulnerability
Priority LOW 34CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.
Summary
Author PHP Object Injection in ShortPixel Image Optimizer <= 6.4.3 versions.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00446 39th 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
- Total
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 |
|---|---|---|---|---|---|
| ShortPixel | ShortPixel Image Optimizer | up to 6.4.3 | — | No fix listed | CNA |
- ShortPixel Image Optimizer VendorShortPixel Affected up to 6.4.3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-39471
- 2026-10-03 Alias added: GHSA-8wj8-vcgv-j3hf
More ShortPixel vulnerabilities
- TI-2023-04280 Enable Media Replace < 4.1.3 - Author+ PHP Object Injection CVSS 3.1HIGH 8.8
- TI-2023-00241 Enable Media Replace < 4.0.2 - Author+ Arbitrary File Upload CVSS 3.1HIGH 8.8
- TI-2023-00318 ShortPixel Adaptive Images < 3.6.3 - Reflected XSS CVSS 3.1MEDIUM 6.1
- TI-2026-14215 ShortPixel Image Optimizer <= 6.5.5 - Authenticated (Author+) PHP Object Injection via Nested JSON Post Content CVSS 3.1HIGH 8.8
- TI-2026-83296 PHP object injection in Enable Media Replace WordPress plugin CVSS 3.1HIGH 8.8
- TI-2023-15794 WordPress ShortPixel Adaptive Images Plugin <= 3.7.1 is vulnerable to Cross Site Request Forgery (CSRF) CVSS 3.1HIGH 8.8
Sources
- CVE-2026-39471 · CVE Program
- CVE-2026-39471 · NVD
- FIRST EPSS
- GHSA-8wj8-vcgv-j3hf · GitHub Advisory Database · CC BY 4.0
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