CVE-2026-2027

MEDIUM

AMP Enhancer <= 1.0.49 - Authenticated Stored XSS via AMP Custom CSS

Title source: llm

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.

References (4)

Core 4

Core References

Product

https://plugins.trac.wordpress.org/browser/amp-enhancer/tags/1.0.49/admin/amp-enhancer-custom-css/amp-enhancer-custom-css.php#L13

Product

https://plugins.trac.wordpress.org/browser/amp-enhancer/trunk/admin/amp-enhancer-custom-css/amp-enhancer-custom-css.php#L13

Various Sources

https://gist.github.com/indonumberone/b373b970da88e87a218aed58d92ccfb2

Third Party Advisory

https://www.wordfence.com/threat-intel/vulnerabilities/id/14014260-e872-48d8-8788-f89dbeec2080?source=cve

Scores

CVSS v3 4.4

EPSS 0.0020

EPSS Percentile 10.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (1)

ampenhancer/AMP Enhancer – Compatibility Layer for Official AMP Plugin < 1.0.49

Published Feb 14, 2026

Tracked Since Feb 18, 2026