CVE-2021-4171 json
Business Logic Errors in janeczku/calibre-web
published 2022-01-17 4 y ago modified 2026-10-27 12 d ago also GHSA-xp7p-3gx7-j6wx , PYSEC-2026-307 , EUVD-2022-0745
- cvss
- 7.7
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
calibre-web is vulnerable to Business Logic Errors
Patch / fix
- pypi calibreweb 0.6.15
- janeczku janeczku/calibre-web 0.6.15
Exploit prediction
1.39% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/1117f439-133c-4563-afb2-6cd80607bd5c referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.7 | CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | calibreweb | <0.6.15 |
0.6.15 |
Affected products
- janeczku janeczku/calibre-web
Classification
- Weakness
-
- CWE-840 Business Logic Errors
References
-
github.com
/janeczku/calibre-web/commit/3e0d8763c377d2146462811e3e4ccf13f0d312ce
web, patch, third-party-advisory
-
huntr.dev
/bounties/1117f439-133c-4563-afb2-6cd80607bd5c
web, exploit, patch, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-4171
advisory
-
github.com
/janeczku/calibre-web
package
-
github.com
/pypa/advisory-database/tree/main/vulns/calibreweb/PYSEC-2026-307.yaml
web
-
pypi.org
/project/calibreweb
web, package
-
github.com
/advisories/GHSA-xp7p-3gx7-j6wx
advisory
Sources
- CVE List CVE-2021-4171
- GitHub Advisory GHSA-xp7p-3gx7-j6wx
- NVD CVE-2021-4171
- OSV PYSEC-2026-307
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.