CVE-2026-9635 Cross-site scripting in WP Shortcode by MyThemeShop
Authenticated attackers can inject arbitrary scripts via the title attribute, leading to code execution when users view the page.
- 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-2026-9635?
CVE-2026-9635 is a medium-severity cross-site scripting vulnerability in WP Shortcode by MyThemeShop, published on 23 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The WP Shortcode by MyThemeShop plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' parameter of the [tab] shortcode in versions up to, and including, 1.4.17. This is due to insufficient input sanitization and output escaping in the mts_tabs() function, which outputs the title shortcode attribute directly into the HTML output between anchor tags without applying any escaping functions. 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-2026-9635?
How do I fix CVE-2026-9635?
No fix has been published for CVE-2026-9635 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-2026-9635 being exploited?
There is no known exploitation of CVE-2026-9635 in the wild and no public exploit code.
Sources
Also known as GHSA-q9pq-xp5c-jmhr.