[github.com/gphper/ginadmin] Arbitrary file read in ginadmin

In ginadmin through 05-10-2022, the incoming path value is not filtered, resulting in arbitrary file reading.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-30428
• https://github.com/gphper/ginadmin/issues/9
• https://github.com/gphper/ginadmin/commit/726109f01ad23523715f36f7d272958064666a30
• https://github.com/advisories/GHSA-5824-6jfv-xr3r