CVE-2026-1395 Gutentools <= 1.1.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Slider Block Attributes
Authenticated attackers with Contributor access can inject arbitrary scripts via Post Slider block attributes, leading to stored XSS execution on victim 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-2026-1395?
CVE-2026-1395 is a medium-severity cross-site scripting vulnerability in Gutentools, published on 22 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Gutentools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Post Slider block's block_id attribute in all versions up to, and including, 1.1.3. This is due to insufficient input sanitization and output escaping combined with a custom unescaping routine that reintroduces dangerous characters. 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-2026-1395?
How do I fix CVE-2026-1395?
No fix has been published for CVE-2026-1395 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-2026-1395 being exploited?
There is no known exploitation of CVE-2026-1395 in the wild and no public exploit code.
Sources
Also known as GHSA-gw9v-4w4q-22c9.