Server-Side Request Forgery Vulnerability in LimeSurvey by LimeSurvey GmbH
CVE-2026-63107

6.3MEDIUM

Key Information:

Vendor

Limesurvey

Status
Limesurvey
Vendor
CVE Published:
20 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-63107?

LimeSurvey versions 6.17.10 and 7.0.4 are vulnerable to server-side request forgery (SSRF) through their REST API. This vulnerability allows authenticated users to manipulate the Host header, enabling the server to execute arbitrary HTTP requests. Exploiting this flaw could permit attackers to access internal network services and cloud metadata endpoints, potentially leading to the leakage of sensitive credentials, such as IAM tokens, contained within instance metadata services.

Affected Version(s)

LimeSurvey 0 <= 6.17.10

LimeSurvey 0 <= 6.17.10

LimeSurvey 0 <= 7.0.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-63107 - Proof of Concept

References

https://github.com/geo-chen/oss/blob/main/limesurvey.md
technical-descriptionexploit
https://www.vulncheck.com/advisories/limesurvey-ssrf-via-...
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.