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CVE-2025-24013— CodeIgniter validation of header name and value

Quick assessment

Affected
codeigniter4 CodeIgniter4
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.

CodeIgniter是Codeigniter开源的一个轻量级、快速、灵活和安全的 PHP 全栈 Web 框架。 CodeIgniter 4.5.8之前版本存在安全漏洞，该漏洞源于对HTTP头部名称和值的验证不当，可能导致应用错误或无效请求，严重时引发拒绝服务(DoS)。

CVSS 5.3 · Medium EPSS 0.50% · P40
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I. Basic Information for CVE-2025-24013

Vulnerability Information
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Vulnerability Title
CodeIgniter validation of header name and value
Source: CVE Program / CVE List V5
Vulnerability Description
CodeIgniter is a PHP full-stack web framework. Prior to 4.5.8, CodeIgniter lacked proper header validation for its name and value. The potential attacker can construct deliberately malformed headers with Header class. This could disrupt application functionality, potentially causing errors or generating invalid HTTP requests. In some cases, these malformed requests might lead to a DoS scenario if a remote service’s web application firewall interprets them as malicious and blocks further communication with the application. This vulnerability is fixed in 4.5.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
解释冲突
Source: CVE Program / CVE List V5
Vulnerability Title
CodeIgniter 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CodeIgniter是Codeigniter开源的一个轻量级、快速、灵活和安全的 PHP 全栈 Web 框架。 CodeIgniter 4.5.8之前版本存在安全漏洞，该漏洞源于对HTTP头部名称和值的验证不当，可能导致应用错误或无效请求，严重时引发拒绝服务(DoS)。
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
codeigniter4 CodeIgniter4 < 4.5.8 -

II. Public POCs for CVE-2025-24013

# 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.
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claude_code · 2979 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2025-24013

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Patches & Fixes for CVE-2025-24013 (1)

Vendor Advisories for CVE-2025-24013 (2)

News Coverage for CVE-2025-24013 (1)

IV. Related Vulnerabilities

Same product: CodeIgniter4
Same vendor: codeigniter4
Same weakness: CWE-436

V. Comments for CVE-2025-24013

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