CVE-2020-37056
MEDIUM EPSS 41.1%
Published Jan 30, 20265mo ago · Modified Jun 17, 20262w ago
6.9 CVSS 4.0
Published Jan 30, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago
Description
Crystal Shard http-protection 0.2.0 contains an IP spoofing vulnerability that allows attackers to bypass protection middleware by manipulating request headers. Attackers can hardcode consistent IP values across X-Forwarded-For, X-Client-IP, and X-Real-IP headers to circumvent security checks and gain unauthorized access.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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 Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
41.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-290
References 3
- github.com https://github.com/rogeriozambon/http-protection
- exploit-db.com https://www.exploit-db.com/exploits/48533
- vulncheck.com https://www.vulncheck.com/advisories/crystal-shard-http-protection-ip-spoofing-bypass
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.