High severity · published Jun 15, 2026
CVE-2026-39471
WordPress ShortPixel Image Optimizer plugin <= 6.4.3 - PHP Object Injection vulnerability
7.2
CVSS
0.4%
EPSS
No
On KEV
Description
Author PHP Object Injection in ShortPixel Image Optimizer <= 6.4.3 versions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
ShortPixel Image Optimizer · ShortPixel
through 6.4.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39471
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39471
patchstack.com
https://patchstack.com/database/wordpress/plugin/shortpixel-image-optimiser/vulnerability/wordpress-shortpixel-image-optimizer-plugin-6-4-3-php-object-injection-vulnerability?_s_id=cve
More from ShortPixel Image Optimizer
6.5
CVE-2026-103070
WordPress ShortPixel Image Optimizer plugin <= 6.5.6 - Cross Site Scripting (XSS) vulnerability
4.9
CVE-2026-97246
WordPress ShortPixel Image Optimizer plugin <= 6.5.5 - PHP Object Injection vulnerability