CVE-2021-23423 json
Directory Traversal
published 5y ago modified 4mo ago also GHSA-hf6p-4rv2-9qrp , PYSEC-2021-117 , EUVD-2021-0034
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 0
- none known
Summary
This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing include, include-code or include-raw block is processed. The contents of arbitrary files could be disclosed in the HTML output.
Patch / fix
- pypi bikeshed 3.0.0
- n/a bikeshed 3.0.0
Is CVE-2021-23423 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
1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- snyk.io https://snyk.io/vuln/SNYK-PYTHON-BIKESHED-1537647 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| GitHub | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | bikeshed | <3.0.0 |
3.0.0 |
Affected products
- n/a bikeshed
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/tabatkins/bikeshed/commit/b2f668fca204260b1cad28d5078e93471cb6b2dd
web, patch, third-party-advisory
-
snyk.io
/vuln/SNYK-PYTHON-BIKESHED-1537647
web, exploit, patch, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-23423
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/bikeshed/PYSEC-2021-117.yaml
web
-
github.com
/tabatkins/bikeshed
package
-
github.com
/advisories/GHSA-hf6p-4rv2-9qrp
advisory
Sources
- CVE List CVE-2021-23423
- GitHub Advisory GHSA-hf6p-4rv2-9qrp
- NVD CVE-2021-23423
- OSV PYSEC-2021-117
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.