SSRF in Limesurvey
CVE-2026-63107
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.004 (28.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Limesurvey — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (technical-description, exploit)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-63107?
- CVE-2026-63107 is a high-severity vulnerability in Limesurvey, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-07-20.
- How severe is CVE-2026-63107?
- High severity. CVSS v3 base score is 7.7 out of 10.