CVE-2020-37056
Crystal Shard http-protection 0.2.0 - IP Spoofing Bypass
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.9EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
30 Jan 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
Crystal Shard · http-protectionWant to know if your infrastructure is exposed to this?
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