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CVE-2018-25103— Use-after-free vulnerabilities in lighttpd <= 1.4.50

Quick assessment

Affected
lighttpd lighttpd
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.

lighttpd是德国Jan Kneschke个人开发者的一款开源的Web服务器。 lighttpd 1.4.50版本及之前版本存在安全漏洞，该漏洞源于内存释放后重用。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.67% · P50

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2018-25103

Vulnerability Information
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Vulnerability Title
Use-after-free vulnerabilities in lighttpd <= 1.4.50
Source: CVE Program / CVE List V5
Vulnerability Description
There exists use-after-free vulnerabilities in lighttpd <= 1.4.50 request parsing which might read from invalid pointers to memory used in the same request, not from other requests.
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
lighttpd 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
lighttpd是德国Jan Kneschke个人开发者的一款开源的Web服务器。 lighttpd 1.4.50版本及之前版本存在安全漏洞，该漏洞源于内存释放后重用。
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
lighttpd lighttpd * ~ 1.4.50 -

II. Public POCs for CVE-2018-25103

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: lighttpd 1.4.50 process survived malformed-chunked UAF request (server alive); proof token PROOF_ecd0d7ae00cad120 retrieved from exploited server
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 3554 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2018-25103

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Patches & Fixes for CVE-2018-25103 (2)

Vendor Advisories for CVE-2018-25103 (1)

Security Blog Posts for CVE-2018-25103 (1)

Other References for CVE-2018-25103 (1)

Other References for CVE-2018-25103 (1)

IV. Related Vulnerabilities

Same product: lighttpd
Same vendor: lighttpd

V. Comments for CVE-2018-25103

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