CVE-2021-4170 json
Cross-site Scripting (XSS) - Stored in janeczku/calibre-web
published 4y ago modified 4mo ago also GHSA-wrp6-9w7f-3wxg , PYSEC-2026-620 , EUVD-2022-0728
- cvss
- 7.3
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
calibre-web is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Patch / fix
- pypi calibreweb 0.6.15
- janeczku janeczku/calibre-web 0.6.15
Is CVE-2021-4170 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.84% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/ff395101-e392-401d-ab4f-579c63fbf6a0 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | calibreweb | <0.6.15 |
0.6.15 |
Affected products
- janeczku janeczku/calibre-web
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/janeczku/calibre-web/commit/7ad419dc8c12180e842a82118f4866ac3d074bc5
web, patch, third-party-advisory
-
huntr.dev
/bounties/ff395101-e392-401d-ab4f-579c63fbf6a0
web, exploit, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-4170
advisory
-
github.com
/janeczku/calibre-web
web
-
pypi.org
/project/calibreweb
package
-
github.com
/advisories/GHSA-wrp6-9w7f-3wxg
advisory
Sources
- CVE List CVE-2021-4170
- GitHub Advisory GHSA-wrp6-9w7f-3wxg
- NVD CVE-2021-4170
- OSV PYSEC-2026-620
Fencer Intel 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.