To receive fixes for security vulnerabilities it is required to always upgrade to the latest version of Calibre-Web. See https://github.com/janeczku/calibre-web/releases/latest for the latest release.
## History
| Fixed in | Description |CVE number |
| ---------- |---------|---------|
| 3rd July 2018 | Guest access acts as a backdoor||
| V 0.6.7 |Hardcoded secret key for sessions |CVE-2020-12627 |
| V 0.6.13|Calibre-Web Metadata cross site scripting |CVE-2021-25964|
| V 0.6.13|Name of Shelves are only visible to users who can access the corresponding shelf Thanks to @ibarrionuevo||
## Staement regarding Log4j (CVE-2021-44228 and related)
Calibre-web is not affected by bugs related to Log4j. Calibre-Web is a python program, therefore not using Java, and not using the Java logging feature log4j.