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

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

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 BJ Lazy Load versions prior to 1.1.0

Description The BJ Lazy Load plugin for WordPress contains a Stored Cross-Site Scripting issue within the filter images() function. The flaw arises from the use of preg replace for regex-based HTML processing, which fails to properly handle HTML attribute boundaries when replacing src attributes. This allows crafted content within a class attribute to be promoted to actual DOM attributes after processing. Consequently, authenticated attackers with Contributor-level access or higher can inject arbitrary web scripts into pages, which then execute when a user visits the affected page.

Recommendations Update the plugin to a version later than 1.0.9. As a temporary workaround, restrict the use of the filter images() function to minimize the risk of exploitation.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-2300

Affected Products

Bj-Lazy-Load

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-2300 · Security 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/tags/1.0.9/inc/class-bjll.php#L121 · 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
• https://plugins.trac.wordpress.org/browser/bj-lazy-load/tags/1.0.9/inc/class-bjll.php#L210 · Note
• https://t.me/cveNotify/163218 · Telegram Post