WordPress plugin
Add to Header security & vulnerabilities
Unpatched vulnerability in the latest version
At least one vulnerability affects the latest version and no fix has been released. Deactivate the plugin or restrict access to the affected feature until the vendor ships a patch.
- Critical0
- High0
- Medium1
- Low0
All Add to Header vulnerabilities
| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.1 | Cross-Site Request Forgery to Stored Cross-Site Scripting ≤1.0No patch available | CVE-2025-39423 |
- Medium6.1Cross-Site Request Forgery to Stored Cross-Site Scripting
≤1.0No patch available
Add to Header: common questions
Does Add to Header have known vulnerabilities?
Yes. VulnCrest Radar lists 1 known vulnerability in Add to Header: 1 medium. At least one is not fixed in the latest version.
How do I check which version of Add to Header I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Add to Header vulnerability?
CVE-2025-39423, published Apr 17, 2025: Add to Header <= 1.0 - Cross-Site Request Forgery to Stored Cross-Site Scripting. Severity: Medium (CVSS 6.1).
Is any Add to Header vulnerability listed in CISA KEV?
No. None of the known Add to Header vulnerabilities is currently listed in the CISA KEV catalog.