CVE-2026-3513 Cross-site scripting in TableOn – WordPress Posts Table Filterable
Authenticated attackers can inject arbitrary scripts via shortcode attributes, leading to code execution or account takeover when users view affected pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3513?
CVE-2026-3513 is a medium-severity cross-site scripting vulnerability in realmag777 TableOn – WordPress Posts Table Filterable, published on 8 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-3513?
How do I fix CVE-2026-3513?
No fix has been published for CVE-2026-3513 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-3513 being exploited?
There is no known exploitation of CVE-2026-3513 in the wild and no public exploit code.
Sources
Also known as GHSA-hwr5-vgw5-5q99.