CVE-2021-27964

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.

• CWE-434

• http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
• https://github.com/erberkan/SonLogger-vulnsExploit, Third Party Advisory
• https://www.sonlogger.com/releasenotesRelease Notes, Vendor Advisory
• http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
• https://github.com/erberkan/SonLogger-vulnsExploit, Third Party Advisory
• https://www.sonlogger.com/releasenotesRelease Notes, Vendor Advisory

Published

Mar 5, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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