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CVE-2025-57783— Improper header parsing may lead to request smuggling

Quick assessment

Affected
Hiawatha Hiawatha Web server
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.

Hiawatha是Hugo Leisink个人开发者的一套适用于Unix系统的安全Web服务器。该产品能够阻止XSS、SQL注入和CSRF等攻击，并提供服务器监控功能。 Hiawatha 11.7版本存在安全漏洞，该漏洞源于标头解析不当，可能导致请求夹带，从而访问受限制资源。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-57783

Vulnerability Information
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Vulnerability Title
Improper header parsing may lead to request smuggling
Source: CVE Program / CVE List V5
Vulnerability Description
Improper header parsing may lead to request smuggling has been identified in Hiawatha webserver version 11.7 which allows an unauthenticated attacker to access restricted resources managed by Hiawatha webserver.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Hiawatha 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hiawatha是Hugo Leisink个人开发者的一套适用于Unix系统的安全Web服务器。该产品能够阻止XSS、SQL注入和CSRF等攻击，并提供服务器监控功能。 Hiawatha 11.7版本存在安全漏洞，该漏洞源于标头解析不当，可能导致请求夹带，从而访问受限制资源。
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
Hiawatha Hiawatha Web server 11.7 ~ 8.5 -

II. Public POCs for CVE-2025-57783

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III. Intelligence Information for CVE-2025-57783

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Same Patch Batch · Hiawatha · 2026-01-26 · 3 CVEs total

CVE-2025-57785 Double free in XSLT in 'show_index'
CVE-2025-57784 Tomahawk authentication timing attack due to usage of 'strcmp'

IV. Related Vulnerabilities

Same product: Hiawatha Web server
Same vendor: Hiawatha

V. Comments for CVE-2025-57783

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