Stored cross-site scripting in LazyLoad Plugin for WordPress
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The LazyLoad Plugin for WordPress is affected in all versions up to and including 2.4.0. Insufficient input sanitization and output escaping of the comment_content parameter let crafted comments store script that the plugin renders into page HTML (CWE-79). An unauthenticated attacker can inject arbitrary web scripts that run when a user accesses an injected page, but a site administrator must first approve the crafted comment.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
The LazyLoad Plugin – Lazy Load Images, Videos, and Iframes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment_content (rendered inline into the page HTML)' parameter in all versions up to, and including, 2.4.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. WordPress core's wp_kses_data allow-list does not strip the crafted payload on save because it uses only permitted tags and attributes; the event handler is concealed inside a broken attribute region and is only promoted to a real DOM attribute by the plugin's render-time str_replace transformation. Additionally, a site administrator must approve the crafted comment before the payload is served to other visitors.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for LazyLoad Plugin.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-10 Threatist record created from CVE-2026-100196
- 2026-10-10 Alias added: GHSA-mj58-4j67-93fr
- 2026-10-11 CISA SSVC decision points changed
- 2026-10-11 Priority changed: MEDIUM → LOW
References
Other 10
- https://www.wordfence.com/threat-intel/vulnerabilities/id/af1060c6-9247-4059-ad6e-993fb7cee6d4?source=cve
- https://plugins.trac.wordpress.org/browser/rocket-lazy-load/tags/2.4.0/src/Dependencies/RocketLazyload/Image.php#L118
- https://plugins.trac.wordpress.org/browser/rocket-lazy-load/tags/2.4.0/src/Dependencies/RocketLazyload/Image.php#L115
- https://plugins.trac.wordpress.org/browser/rocket-lazy-load/tags/2.4.0/src/Dependencies/RocketLazyload/Image.php#L116
- https://plugins.trac.wordpress.org/browser/rocket-lazy-load/tags/2.4.0/src/Dependencies/RocketLazyload/Image.php#L70
- https://plugins.trac.wordpress.org/browser/rocket-lazy-load/tags/2.4.0/src/Subscriber/LazyloadSubscriber.php#L326
- https://plugins.trac.wordpress.org/browser/rocket-lazy-load/tags/2.4.0/src/Subscriber/LazyloadSubscriber.php#L313
- https://plugins.trac.wordpress.org/browser/rocket-lazy-load/tags/2.4.0/src/Subscriber/LazyloadSubscriber.php#L82
- https://wordpress.org/plugins/rocket-lazy-load/
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3730807%40rocket-lazy-load%2Ftags%2F2.4.1&old=3380138%40rocket-lazy-load%2Ftags%2F2.4.0
More WP Media vulnerabilities
- TI-2024-03858 Search & Replace < 3.2.2 - Admin+ SQL injection CVSS 3.1HIGH 7.2
- TI-2024-25993 WordPress Search & Replace plugin <= 3.2.2 - Deserialization of untrusted data vulnerability CVSS 3.1CRITICAL 9.8
- TI-2026-69868 Code injection in WordPress WP Rocket plugin CVSS 3.1HIGH 7.5
- TI-2023-05067 BackWPup <= 4.0.1 - Authenticated (Administrator+) Directory Traversal CVSS 3.1HIGH 8.7
- TI-2026-05204 Cross-site scripting in WP Rocket CVSS 3.1HIGH 7.2
- TI-2026-05464 BackWPup <= 5.6.6 - Authenticated (Administrator+) Local File Inclusion via 'block_name' Parameter CVSS 3.1HIGH 7.2
Sources
- CVE-2026-100196 · CVE Program
- CVE-2026-100196 · NVD
- FIRST EPSS
- GHSA-mj58-4j67-93fr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences