PT-2026-39944 · Bjornjohansen · Bj-Lazy-Load

Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-2300

NVD

CVSS v3.1

6.4

Medium

Base vector

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

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-2300

Affected Products

Bj-Lazy-Load

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-2300 · Security Note
• https://plugins.trac.wordpress.org/browser/bj-lazy-load/tags/1.0.9/inc/class-bjll.php#L121 · Note
• https://plugins.trac.wordpress.org/browser/bj-lazy-load/tags/1.0.9/inc/class-bjll.php#L210 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/f443846f-4d70-4ca0-beeb-d2e839b14765?source=cve · Note
• https://plugins.trac.wordpress.org/browser/bj-lazy-load/trunk/inc/class-bjll.php#L121 · Note
• https://plugins.trac.wordpress.org/browser/bj-lazy-load/trunk/inc/class-bjll.php#L210 · Note