What’s Vulnerable › Vulnerabilities

CVE-2021-4171: Business Logic Errors in janeczku/calibre-web

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-01-17 · updated 2026-06-17
• Weakness: CWE-840

Description

calibre-web is vulnerable to Business Logic Errors

Affected products

• janeczku/calibre-web: before 0.6.15 — fixed in 0.6.15

How to fix

Upgrade to a fixed version: janeczku/calibre-web 0.6.15. Check the vendor advisory for mitigations.

References

• https://github.com/janeczku/calibre-web/commit/3e0d8763c377d2146462811e3e4ccf13f0d312ce
• https://huntr.dev/bounties/1117f439-133c-4563-afb2-6cd80607bd5c
• https://github.com/janeczku/calibre-web/commit/3e0d8763c377d2146462811e3e4ccf13f0d312ce
• https://huntr.dev/bounties/1117f439-133c-4563-afb2-6cd80607bd5c

Get alerted when CVE-2021-4171 or the next vulnerability affects your stack