CVE-2019-11401: Unrestricted Upload of File with Dangerous Type

May 24, 2022 (updated July 14, 2023)

A issue was discovered in SiteServer CMS 6.9.0. It allows remote attackers to execute arbitrary code because an administrator can add the permitted file extension .aassp, which is converted to .asp because the “as” substring is deleted.

References

github.com/advisories/GHSA-ff4w-8chr-w2x9
github.com/siteserver/cms/issues/1858
nvd.nist.gov/vuln/detail/CVE-2019-11401

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