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CVE-2026-63107— LimeSurvey SSRF via REST API Survey Template Host Header

Quick assessment

Affected
LimeSurvey LimeSurvey
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.

LimeSurvey是LimeSurvey组织开源的一套开源的在线问卷调查程序,它支持调查程序开发、调查问卷发布以及数据收集等功能。 LimeSurvey 6.17.10及之前版本和7.0.4及之前版本存在服务端请求伪造漏洞，该漏洞源于REST API调查模板端点中未对HTTP Host标头进行清理，允许经过身份验证的攻击者通过提供特制的Host标头，使服务器发起任意HTTP请求，从而访问内部网络服务、云元数据端点，并提取敏感凭据如IAM令牌。

CVSS 7.7 · High EPSS 0.35% · P27

Affected Version Matrix 2

VendorProduct Version RangeStatus
LimeSurvey LimeSurvey ≤ 6.17.10 affected
≤ 7.0.4 affected
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I. Basic Information for CVE-2026-63107

Vulnerability Information
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Vulnerability Title
LimeSurvey SSRF via REST API Survey Template Host Header
Source: CVE Program / CVE List V5
Vulnerability Description
LimeSurvey through 6.17.10 and 7.0.4 contains a server-side request forgery vulnerability in the REST API survey template endpoint that allows authenticated users to cause the server to issue arbitrary HTTP requests by supplying a manipulated Host header. Attackers can exploit the unsanitized use of the HTTP Host header in the getTemplateData() function to reach internal network services, cloud metadata endpoints, and extract sensitive credentials such as IAM tokens from instance metadata services.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
LimeSurvey 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LimeSurvey是LimeSurvey组织开源的一套开源的在线问卷调查程序,它支持调查程序开发、调查问卷发布以及数据收集等功能。 LimeSurvey 6.17.10及之前版本和7.0.4及之前版本存在服务端请求伪造漏洞，该漏洞源于REST API调查模板端点中未对HTTP Host标头进行清理，允许经过身份验证的攻击者通过提供特制的Host标头，使服务器发起任意HTTP请求，从而访问内部网络服务、云元数据端点，并提取敏感凭据如IAM令牌。
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
LimeSurvey LimeSurvey 0 ~ 6.17.10 -

II. Public POCs for CVE-2026-63107

# 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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Qwen3.6-35B-A3B · 6942 chars
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III. Intelligence Information for CVE-2026-63107

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Vendor Advisories for CVE-2026-63107 (1)

Other References for CVE-2026-63107 (1)

IV. Related Vulnerabilities

Same product: LimeSurvey
Same vendor: LimeSurvey
Same weakness: CWE-918

V. Comments for CVE-2026-63107

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