BJ Lazy Load <= 1.0.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Custom HTML Block

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-2300
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-12 09:16:39 UTC
Updated2026-05-12 09:16:39 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Bjornjohansen BJ Lazy Load affected 1.0.9 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/f443846f-4d70-4ca0-beeb-d2e83... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/bj-lazy-load/trunk/inc/class-bjll.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/bj-lazy-load/tags/1.0.9/inc/class-bjll.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/bj-lazy-load/trunk/inc/class-bjll.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/bj-lazy-load/tags/1.0.9/inc/class-bjll.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Muhammad Yudha - DJ (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-11T19:10:13.000ZDisclosed
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