# CVEs published 2021-09-05

4 CVEs were published on September 5, 2021: 0 critical, 0 high. Days are UTC.

- [CVE-2021-40523](https://cve.now/CVE-2021-40523.md): In Contiki 3.0, Telnet option negotiation is mishandled. (no CVSS)
- [CVE-2021-40524](https://cve.now/CVE-2021-40524.md): In Pure-FTPd before 1.0.50, an incorrect max\_filesize quota mechanism in the server allows attackers to upload files of unbounded size, whic (no CVSS)
- [CVE-2021-40516](https://cve.now/CVE-2021-40516.md): WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bound (no CVSS)
- [CVE-2021-23439](https://cve.now/CVE-2021-23439.md): Cross-site Scripting (XSS) (CVSS 4.2, file-upload-with-preview)

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