CVE-2026-15394 Header Footer Script Adder <= 2.1 - Authenticated (Author+) Stored Cross-Site Scripting via 'asm_code' Snippet Meta
Authenticated attackers with author-level access can inject arbitrary web scripts via snippet meta, 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-2026-15394?
CVE-2026-15394 is a medium-severity cross-site scripting vulnerability in mahethekiller Header Footer Script Adder, published on 23 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Header Footer Script Adder – Insert Code in Header, Body & Footer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'asm_code' Snippet Meta in all versions up to, and including, 2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-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-2026-15394?
How do I fix CVE-2026-15394?
No fix has been published for CVE-2026-15394 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-2026-15394 being exploited?
There is no known exploitation of CVE-2026-15394 in the wild and no public exploit code.
Sources
Also known as GHSA-6gm9-485j-jqr3.