Vulnerability · Published Aug 16, 2021 · Assigned by snyk
CVE-2021-23422Arbitrary Code Injection
High 7.8
In plain English
A high-severity security flaw in bikeshed. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.8%top 43.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing Inline Tag Command metadata is processed. When an arbitrary OS command is executed, the command output would be included in the HTML output.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | bikeshed | 3.0.0 | GHSA-87cj-px37-rc3x |
| PyPI | bikeshed | 3.0.0 | PYSEC-2021-116 |
| Ubuntu:22.04:LTS | bikeshed | no fix listed | UBUNTU-CVE-2021-23422 |
| Ubuntu:24.04:LTS | bikeshed | no fix listed | UBUNTU-CVE-2021-23422 |
| Ubuntu:25.10 | bikeshed | no fix listed | UBUNTU-CVE-2021-23422 |
| Ubuntu:26.04:LTS | bikeshed | no fix listed | UBUNTU-CVE-2021-23422 |
| Ubuntu:26.10 | bikeshed | no fix listed | UBUNTU-CVE-2021-23422 |
Affected products (as reported)
References
- https://github.com/tabatkins/bikeshed/commit/b2f668fca204260b1cad28d5078e93471cb6b2dd x_refsource_MISC
- https://snyk.io/vuln/SNYK-PYTHON-BIKESHED-1537646 x_refsource_MISC