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CVE-2026-39471 ShortPixel CVE debrief

CVE-2026-39471 is a HIGH-severity vulnerability (CVSS Score: 7.2) affecting the ShortPixel Image Optimizer plugin, versions up to 6.4.3. This vulnerability allows for Author PHP Object Injection attacks. The CVE was published on 2026-06-15T21:16:43.860Z and last modified on 2026-06-15T21:24:32.790Z.

Vendor
ShortPixel
Product
ShortPixel Image Optimizer
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of the ShortPixel Image Optimizer plugin, particularly those using versions up to 6.4.3, should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by a PHP Object Injection issue in the ShortPixel Image Optimizer plugin. This type of vulnerability occurs when an attacker can inject malicious PHP objects into the application, potentially leading to code execution, data tampering, or other security issues.

Defensive priority

HIGH

Recommended defensive actions

  • Update the ShortPixel Image Optimizer plugin to a version that is not vulnerable (if available).
  • Review and monitor the plugin's configuration and usage to prevent potential exploitation.

Evidence notes

The CVE details were obtained from the official CVE record [cve-org] and the NVD detail page [nvd]. Additional information was sourced from Patchstack [ref-4].

Official resources

CVE-2026-39471 was published on 2026-06-15T21:16:43.860Z and last modified on 2026-06-15T21:24:32.790Z.