CVE-2026-2027 AMP Enhancer <= 1.0.49 - Authenticated (Administrator+) Stored Cross-Site Scripting via AMP Custom CSS Setting
Administrators can inject arbitrary scripts via AMP Custom CSS settings in multi-site or restricted HTML environments, affecting WordPress sites using this plugin.
- 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-2026-2027?
CVE-2026-2027 is a medium-severity cross-site scripting vulnerability in ampenhancer AMP Enhancer – Compatibility Layer for Official AMP Plugin, published on 14 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The AMP Enhancer – Compatibility Layer for Official AMP Plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the AMP Custom CSS setting in all versions up to, and including, 1.0.49 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with Administrator-level access 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-2026-2027?
How do I fix CVE-2026-2027?
No fix has been published for CVE-2026-2027 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-2026-2027 being exploited?
There is no known exploitation of CVE-2026-2027 in the wild and no public exploit code.
Sources
Also known as GHSA-26cj-h8gp-hcf9.