Vulnerability Description
The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the lazy-loading image processing in all versions up to, and including, 3.1.14. This is due to the use of an overly permissive regular expression in the `add_lazyload` function that replaces all occurrences of `\ssrc=` in image tags without limiting to the actual attribute. 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 by crafting an image tag where the `src` URL contains a space followed by `src=`, causing the regex to break the HTML structure and promote text inside attribute values into executable HTML attributes.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/futtta/autoptimize/commit/a0f87112fe80b5a97b036229c41cb184543
- https://plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.14/classes/autop
- https://plugins.trac.wordpress.org/browser/autoptimize/trunk/classes/autoptimize
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
- https://www.wordfence.com/threat-intel/vulnerabilities/id/ddc5c4d7-09dc-45bf-a3c
FAQ
What is CVE-2026-2430?
CVE-2026-2430 is a vulnerability with a CVSS score of 6.4 (MEDIUM). The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the lazy-loading image processing in all versions up to, and including, 3.1.14. This is due to the use of an overl...
How severe is CVE-2026-2430?
CVE-2026-2430 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2430?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.