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CVE-2026-72574— picocms Pico - Host Header Injection Enables Script Source Hijacking

Quick assessment

Affected
picocms Pico
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

picocms Pico是picocms个人开发者的一款轻量级的内容管理系统。 picocms Pico 2.1.4及之前版本存在跨站脚本漏洞，该漏洞源于未验证Host、X-Forwarded-Host、X-Forwarded-Proto和X-Forwarded-Port请求头，可能导致未经身份验证的远程攻击者控制默认主题加载的JavaScript和CSS资产来源。

CVSS 6.1 · Medium EPSS 0.24% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
picocms Pico ≤ 2.1.4 affected
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I. Basic Information for CVE-2026-72574

Vulnerability Information
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Vulnerability Title
picocms Pico - Host Header Injection Enables Script Source Hijacking
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对HTTP头部进行脚本语法转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
picocms Pico 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
picocms Pico是picocms个人开发者的一款轻量级的内容管理系统。 picocms Pico 2.1.4及之前版本存在跨站脚本漏洞，该漏洞源于未验证Host、X-Forwarded-Host、X-Forwarded-Proto和X-Forwarded-Port请求头，可能导致未经身份验证的远程攻击者控制默认主题加载的JavaScript和CSS资产来源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
picocms Pico 0 ~ 2.1.4 -

II. Public POCs for CVE-2026-72574

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-72574

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Vendor Pages for CVE-2026-72574 (2)

IV. Related Vulnerabilities

Same weakness: CWE-644

V. Comments for CVE-2026-72574

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