CVE-2026-1379 HTTP Headers <= 1.19.2 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Custom Headers' Plugin Setting
Administrators can inject scripts via custom headers in WordPress HTTP Headers plugin, affecting multi-site or unfiltered_html disabled setups.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1379?
CVE-2026-1379 is a medium-severity cross-site scripting vulnerability in zinoui HTTP Headers, published on 22 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The HTTP Headers plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.19.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Weakness: CWE-79
Which versions are affected by CVE-2026-1379?
How do I fix CVE-2026-1379?
No fix has been published for CVE-2026-1379 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-2026-1379 being exploited?
There is no known exploitation of CVE-2026-1379 in the wild and no public exploit code.
Sources
Also known as GHSA-8h43-r57g-hmff.