EUVD-2026-19770
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3Tags
Description
ChurchCRM is an open-source church management system. Prior to 6.5.3, it is possible to trigger server-side HTTP/HTTPS requests to arbitrary hosts (SSRF) by supplying a crafted URL in the Referer request header. The server subsequently makes an outbound request to the attacker-controlled domain, confirmed via OAST. This vulnerability is fixed in 6.5.3.
Analysis
Server-Side Request Forgery in ChurchCRM versions prior to 6.5.3 allows authenticated administrators to trigger outbound HTTP/HTTPS requests to arbitrary external hosts by injecting malicious URLs into the Referer header. Attackers with high-privilege access can exploit this to probe internal networks, exfiltrate data, or interact with cloud metadata services. …
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Remediation
Within 24 hours: Inventory all ChurchCRM deployments and identify active installations running versions prior to 6.5.3; audit administrator account activity logs for suspicious referer headers. Within 7 days: Implement network egress filtering to restrict outbound HTTP/HTTPS from ChurchCRM servers to authorized destinations only; review and limit ChurchCRM administrator role assignments to essential personnel. …
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External POC / Exploit Code
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