CVE-2025-11378
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk22th percentile - higher than 22% of all known CVEs
Summary
The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'shortpixel_ajaxRequest' AJAX action in all versions up to, and including, 6.3.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to export and import site options.
Risk Assessment
The risk includes the possibility of unauthorized modification of site settings, which could lead to site takeover or integrity compromise.
Recommendation
It is recommended to immediately update the ShortPixel Image Optimizer plugin to the latest version that includes the fix.
Other vulnerabilities in ShortPixel Image Optimizer
See all- CVE-2026-103070Medium
Stored XSS vulnerability in ShortPixel Image Optimizer (up to 6.5.6) due to improper input neutralization.
- CVE-2026-97246Medium
PHP Object Injection vulnerability in ShortPixel Image Optimizer versions up to 6.5.5, exploitable by a subscriber.
- CVE-2026-17086High
The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.5.5 via deserialization of untrusted input. This makes it possible for authenticated attackers, with author-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
- CVE-2026-39471High
Versions of ShortPixel Image Optimizer up to 6.4.3 are vulnerable to PHP Object Injection attacks, potentially leading to unauthorized system access.
Original NVD description (English source)
The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'shortpixel_ajaxRequest' AJAX action in all versions up to, and including, 6.3.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to export and import site options.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS