CVE-2021-4171

Business Logic Errors in janeczku/calibre-web

7.7 HighFix available

CVE-2021-4171 is a high vulnerability (CVSS 7.7) in Janeczku Calibre-web, published January 17, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.39%, the 72nd percentile. Fixed in calibreweb 0.6.15.

calibre-web is vulnerable to Business Logic Errors

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: High

Exploit likelihood

1.39%Up 0.7 points since Jan 18, 2022

What each source reports

CVE List Score used 7.7

Business Logic Errors in janeczku/calibre-web

calibre-web is vulnerable to Business Logic Errors

Record: CVE-2021-4171
CVSS 3.0: 7.7 HighCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:H
Weakness: CWE-840
Updated: 2026-11-02

EUVDEUVD-2022-0745 7.7

calibre-web is vulnerable to Business Logic Errors

Record: EUVD-2022-0745
CVSS 3.0: 7.7 HighCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-xp7p-3gx7-j6wx 9.8

calibre-web is vulnerable to Business Logic Errors

calibre-web is vulnerable to Business Logic Errors

Record: GHSA-xp7p-3gx7-j6wx
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

NVD 9.8

calibre-web is vulnerable to Business Logic Errors

Record: CVE-2021-4171
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 7.7 HighCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-840
Updated: 2026-11-02

OSV 9.8

calibre-web is vulnerable to Business Logic Errors

Record: CVE-2021-4171
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-xp7p-3gx7-j6wx 9.8

calibre-web is vulnerable to Business Logic Errors

calibre-web is vulnerable to Business Logic Errors

Record: GHSA-xp7p-3gx7-j6wx
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVPYSEC-2026-307 9.8

calibre-web is vulnerable to Business Logic Errors

calibre-web is vulnerable to Business Logic Errors

Record: PYSEC-2026-307
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`calibreweb` PyPI	before 0.6.15	0.6.15
`calibreweb` PyPI	before 0.6.15, plus listed versions 0.6.120.6.130.6.14	0.6.15

History

History
When	Changed	Sources
2026-11-03	aliases	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

References