EUVD-2026-20040
GHSA-hwr5-vgw5-5q99
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
3DescriptionCVE.org
The TableOn - WordPress Posts Table Filterable plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tableon_button' shortcode in all versions up to and including 1.0.4.4. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes such as 'class', 'help_link', 'popup_title', and 'help_title'. The do_shortcode_button() function extracts these attributes without sanitization and passes them to TABLEON_HELPER::draw_html_item(), which concatenates attribute values into HTML using single quotes without escaping (line 29: $item .= " {$key}='{$value}'"). 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 TableOn - WordPress Posts Table Filterable plugin versions up to 1.0.4.4 allows authenticated attackers with Contributor-level access or above to inject arbitrary JavaScript via unescaped shortcode attributes ('class', 'help_link', 'popup_title', 'help_title') in the 'tableon_button' shortcode. The vulnerability results from the do_shortcode_button() function extracting attributes without sanitization and the TABLEON_HELPER::draw_html_item() function concatenating these values directly into HTML output without escaping, enabling malicious scripts to execute in the browsers of users viewing affected pages. No public exploit code or active exploitation has been reported at this time.
Technical ContextAI
The vulnerability stems from inadequate input validation and output encoding in a WordPress plugin shortcode handler. WordPress shortcodes are template tags that allow users to dynamically insert content, and the 'tableon_button' shortcode accepts multiple user-supplied attributes. The root cause (CWE-79: Improper Neutralization of Input During Web Page Generation) occurs in two locations: the do_shortcode_button() function (index.php, lines 489-495) extracts shortcode attributes directly from user input without sanitization, and the TABLEON_HELPER::draw_html_item() function (helper.php, line 29) concatenates these unsanitized values into HTML attributes using single-quoted syntax without entity encoding. An attacker-controlled value such as class="onload='alert(1) can break out of the attribute context and inject event handlers or arbitrary HTML elements. The CPE cpe:2.3:a:realmag777:tableon_-_wordpress_posts_table_filterable identifies the affected plugin by the developer 'realmag777' across all versions up to 1.0.4.4.
RemediationAI
Update the TableOn - WordPress Posts Table Filterable plugin to a patched version released after 1.0.4.4; WordPress plugin repository changelogs and Wordfence advisories should be consulted for the exact fixed version number once released. Interim mitigation steps for sites unable to patch immediately include: restrict Contributor-level and above user access to trusted administrators only, audit existing user accounts and remove unnecessary access, and consider using a WordPress security plugin to monitor for stored XSS payloads in post content. The upstream fix will require sanitizing shortcode attributes using WordPress security functions (e.g., sanitize_text_field(), sanitize_html_class()) and properly escaping output via esc_attr() before insertion into HTML attributes. See Wordfence advisory (https://www.wordfence.com/threat-intel/vulnerabilities/id/33490873-da99-465e-bfb6-44d2ba84f3ee?source=cve) for patch release notifications.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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