What is CVE-2025-6626?

CVE-2025-6626 is a medium-severity vulnerability in Shortpixel Adaptive Images – Webp, Avif, Cdn, Image Optimization, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2025-08-02.

How severe is CVE-2025-6626?

Medium severity. CVSS v3 base score is 4.4 out of 10.

XSS in Shortpixel Adaptive Images – Webp, Avif, Cdn, Image Optimization

CVE-2025-6626

The ShortPixel Adaptive Images – WebP, AVIF, CDN, Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the API URL Setting in all versions up to, and including, 3.10.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (13.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.

Affected products

Shortpixel Adaptive Images – Webp, Avif, Cdn, Image Optimization — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2025-6626?: CVE-2025-6626 is a medium-severity vulnerability in Shortpixel Adaptive Images – Webp, Avif, Cdn, Image Optimization, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2025-08-02.
How severe is CVE-2025-6626?: Medium severity. CVSS v3 base score is 4.4 out of 10.