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CVE-2025-13401

MediumPublished

Autoptimize <= 3.1.13 - Authenticated (Contributor+) Stored Cross-Site Scripting

Published: Dec 3, 2025
Updated: Apr 8, 2026
Assigning CNA: Wordfence
Evidence observed: Aug 6, 2026

Primary CVSS

6.4/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 22.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the LCP Image to preload metabox in all versions up to, and including, 3.1.13 due to insufficient input sanitization and output escaping on user-supplied image attributes in the "create_img_preload_tag" function. This makes it possible for authenticated attackers, with contributor level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Sources

CVE-2025-13401-XSS-StoredPoC
Proof-of-concept for authenticated stored XSS in Autoptimize < 3.1.14, exploiting insufficient attribute sanitization in image preload tag generation.

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