How severe is CVE-2021-23423?

CVE-2021-23423 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-23423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23423?

CVE-2021-23423 affects Bikeshed Project Bikeshed. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23423?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-23423 published?

CVE-2021-23423 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2021-23423

CVE-2021-23423 is a medium-severity vulnerability in Bikeshed Project Bikeshed with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Bikeshed Project Bikeshed
Published: 2021-08-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-23423?: 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.
How severe is CVE-2021-23423?: CVE-2021-23423 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-23423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23423?: CVE-2021-23423 affects Bikeshed Project Bikeshed. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23423?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23423 published?: CVE-2021-23423 was published on 2021-08-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:bikeshed_project:bikeshed:*:*:*:*:*:*:*:*

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