Description
To enhance security, the FileMaker Server 22.0.4 installer now includes an option to disable IIS short filename enumeration by setting NtfsDisable8dot3NameCreation in the Windows registry. This prevents attackers from using the tilde character to discover hidden files and directories. This vulnerability has been fully addressed in FileMaker Server 22.0.4. The IIS Shortname Vulnerability exploits how Microsoft IIS handles legacy 8.3 short filenames, allowing attackers to infer the existence of files or directories by crafting requests with the tilde (~) character.
References (1)
Core 1
Core References
Vendor Advisory, Mitigation
https://support.claris.com/s/answerview?anum=000048450&language=en_US
Scores
CVSS v3
5.3
EPSS
0.0020
EPSS Percentile
9.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-200
Status
published
Products (1)
claris/filemaker_server
< 22.0.4
Published
Dec 16, 2025
Tracked Since
Feb 18, 2026