EUVD-2026-42863
GHSA-j5hg-6jfj-8wjc
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Stored XSS requires a victim to load the injected page (UI:R); contributor auth required (PR:L); payload executes in victim browser context causing scope change (S:C); no availability impact.
Primary rating from Vendor (wordfence).
CVSS VectorVendor: wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Logo Slider - Logo Carousel, Client Logo Slider & Brand Showcase for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'lgx_tooltip_position' parameter in all versions up to, and including, 5.5 due to insufficient input sanitization and output escaping. 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.
AnalysisAI
Stored Cross-Site Scripting in the Logo Slider WordPress plugin (all versions through 5.5) allows authenticated contributors to inject persistent JavaScript payloads via the 'lgx_tooltip_position' parameter, executing in the browser of any user who subsequently visits an affected page. The CVSS scope change (S:C) reflects that injected scripts execute in victim browser contexts - enabling session hijacking or privilege escalation against higher-privileged users including site administrators. No public exploit or CISA KEV listing has been identified at time of analysis, though the low attack complexity and the breadth of contributor-level accounts on WordPress sites make this a realistic risk for multi-author installations.
Technical ContextAI
CWE-79 (Improper Neutralization of Input During Web Page Generation - Stored XSS) arises from the plugin's failure to sanitize the 'lgx_tooltip_position' input on write and to properly escape it on output. The vulnerability spans three files in the plugin's codebase: the admin handler at admin/class-logo-slider-wp-admin.php (line 996), the default template partial at public/partials/template/view-default.php (line 43), and the view controller at public/partials/view-controller.php (line 66). This multi-file footprint indicates the tainted value is stored via the admin class and then rendered unsanitized in two distinct public-facing output paths. The affected product is the 'logo-slider-wp' WordPress plugin, and the fix is captured in SVN changeset 3601263. No CPE string was included in the provided intelligence.
RemediationAI
Update the Logo Slider plugin to the version released after changeset 3601263, available via the WordPress Plugin Repository or directly reviewed at https://plugins.trac.wordpress.org/changeset?reponame=&old=3601263%40logo-slider-wp&new=3601263%40logo-slider-wp. The exact post-fix version number is not independently confirmed from the provided data - verify the installed version post-update exceeds 5.5. If immediate patching is not feasible, restrict contributor-level role assignments to only fully trusted users, which eliminates the exploitation prerequisite; this trade-off limits editorial collaboration but is the most effective compensating control. A Web Application Firewall rule blocking script injection patterns (e.g., '<script', 'javascript:', event handler attributes) in the lgx_tooltip_position parameter provides partial mitigation but can be bypassed with obfuscation and is not a substitute for patching. Removing or deactivating the plugin entirely eliminates exposure at the cost of losing slider functionality.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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