phpSysInfo: IP allowlist (PSI_ALLOWED) bypass via spoofed X-Forwarded-For / Client-IP headers
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.5epss 2.4%
from disclosure to weapon0 days
Published on NVDAug 28
1st PoCJun 25
exploitation probability
2.4%top 17% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
phpSysInfo is a customizable PHP script that displays system information. Prior to 3.4.6, the PSI_ALLOWED access-control check in read_config.php trusts attacker-controlled X-Forwarded-For and Client-IP HTTP headers before REMOTE_ADDR. A remote unauthenticated attacker can supply an allowed address in one of these headers to impersonate a trusted client and access exposed hostname, kernel, CPU, memory, filesystem, and network-interface information. This issue is fixed in version 3.4.6.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
phpsysinfo · phpsysinfopublic PoCs found — 2
exploitdbwww.exploit-db.com/exploits/52648unverifiedgithubgithub.com/mirackayikci/CVE-2026-55584★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.