PT-2026-26713 · WordPress · Autoptimize

Matthew Rollings · Published 2026-03-20 · Updated 2026-03-21 · CVE-2026-2430

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Autoptimize versions up to and including 3.1.14

Description The Autoptimize plugin for WordPress is susceptible to Stored Cross-Site Scripting through the lazy-loading image processing. This is caused by an overly permissive regular expression in the add lazyload function. The regular expression replaces all instances of ssrc= in image tags without restriction to the actual attribute. This allows authenticated attackers with Contributor-level access or higher to inject arbitrary web scripts into pages. Attackers can achieve this by creating an image tag where the src URL contains a space followed by src=, which breaks the HTML structure and promotes text inside attribute values into executable HTML attributes.

Recommendations Update Autoptimize to a version later than 3.1.14.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-2430

Affected Products

Autoptimize

References · 8

• https://osv.dev/vulnerability/CVE-2026-2430 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2430 · Security Note
• https://github.com/futtta/autoptimize/commit/a0f87112fe80b5a97b036229c41cb18454392858 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/ddc5c4d7-09dc-45bf-a3c7-5a0757e3110a?source=cve · Note
• https://plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.14/classes/autoptimizeImages.php#L987 · Note
• https://plugins.trac.wordpress.org/browser/autoptimize/trunk/classes/autoptimizeImages.php#L987 · Note
• https://twitter.com/CVEnew/status/2035262095189475389 · Twitter Post
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3482530%40autoptimize&new=3482530%40autoptimize&sfp_email=&sfph_mail= · Note