Vulnerability Description
The BJ Lazy Load plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `filter_images()` function in all versions up to, and including, 1.0.9. This is due to the use of regex-based HTML processing (`preg_replace`) that does not properly handle HTML attribute boundaries when replacing `src` attributes, allowing crafted content inside a `class` attribute value to be promoted to real DOM attributes after processing. 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/bj-lazy-load/tags/1.0.9/inc/class-bjl
- https://plugins.trac.wordpress.org/browser/bj-lazy-load/tags/1.0.9/inc/class-bjl
- https://plugins.trac.wordpress.org/browser/bj-lazy-load/trunk/inc/class-bjll.php
- https://plugins.trac.wordpress.org/browser/bj-lazy-load/trunk/inc/class-bjll.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/f443846f-4d70-4ca0-bee
FAQ
What is CVE-2026-2300?
CVE-2026-2300 is a vulnerability with a CVSS score of 6.4 (MEDIUM). The BJ Lazy Load plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `filter_images()` function in all versions up to, and including, 1.0.9. This is due to the use of regex-based...
How severe is CVE-2026-2300?
CVE-2026-2300 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-2026-2300?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.