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CVE-2026-56785— FlatPress - Stored Cross-Site Scripting via Unescaped Comment and Contact Form Fields

Quick assessment

Affected
FlatPress FlatPress
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FlatPress是FlatPress社区开源的一个轻量级、易于设置的平面文件博客引擎。 FlatPress 10be83c及之前版本存在跨站脚本漏洞，该漏洞源于在Smarty模板中评论和联系表单的名称、URL和电子邮件字段缺少正确输出编码，可能导致攻击者注入任意HTML和JavaScript，或者绕过URL方案验证注入javascript:或data: URI。

CVSS 8.2 · High EPSS 0.42% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
FlatPress FlatPress < 10be83c affected
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I. Basic Information for CVE-2026-56785

Vulnerability Information
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Vulnerability Title
FlatPress - Stored Cross-Site Scripting via Unescaped Comment and Contact Form Fields
Source: CVE Program / CVE List V5
Vulnerability Description
FlatPress contains a stored cross-site scripting vulnerability in comment and contact forms where name, URL, and email fields are rendered without proper output encoding in Smarty templates. Attackers can inject arbitrary HTML and JavaScript through these fields to execute malicious scripts in browsers of viewers including administrators, or bypass URL scheme validation to inject javascript: or data: URIs.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
FlatPress 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FlatPress是FlatPress社区开源的一个轻量级、易于设置的平面文件博客引擎。 FlatPress 10be83c及之前版本存在跨站脚本漏洞，该漏洞源于在Smarty模板中评论和联系表单的名称、URL和电子邮件字段缺少正确输出编码，可能导致攻击者注入任意HTML和JavaScript，或者绕过URL方案验证注入javascript:或data: URI。
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
FlatPress FlatPress 0 ~ 10be83c -

II. Public POCs for CVE-2026-56785

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7794 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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III. Intelligence Information for CVE-2026-56785

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Patches & Fixes for CVE-2026-56785 (1)

Vendor Advisories for CVE-2026-56785 (1)

Proof of Concept for CVE-2026-56785 (1)

IV. Related Vulnerabilities

Same product: FlatPress
Same weakness: CWE-79

V. Comments for CVE-2026-56785

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