CVE-2021-27964

critical

Description

SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload. An attacker can send a POST request to /Config/SaveUploadedHotspotLogoFile without any authentication or session header. There is no check for the file extension or content of the uploaded file.

References

https://www.sonlogger.com/releasenotes

https://github.com/erberkan/SonLogger-vulns

http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.html

Details

Source: Mitre, NVD

Published: 2021-03-05

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.46021