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Medium · 6.1 CVE-2026-72574 EUVD-2026-55232GHSA-563g-2g6p-xmpf

picocms Pico - Host Header Injection Enables Script Source Hijacking

Published Aug 10, 2026 · Updated Aug 10, 2026 · Assigned by TuranSec

Description

A host header injection vulnerability in picocms/Pico through 2.1.4 allows an unauthenticated remote attacker to control the origin of JavaScript and CSS assets loaded by the default theme. When base_url is unset (the default), Pico::getBaseUrl in lib/Pico.php builds the base URL from unvalidated Host, X-Forwarded-Host, X-Forwarded-Proto, and X-Forwarded-Port request headers.

Affected products

VendorProductAffectedFixed
picocms Pico ≤ 2.1.4 —

References