CVE-2021-20101
CVE-2021-20101 is a medium-severity vulnerability in Machform with a CVSS 3.x base score of 6.1. 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-74.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 5.8
- EPSS exploit prediction: 1% (50th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-74
- Affected product: Machform
- Published:
- Last modified:
Description
Machform prior to version 16 is vulnerable to HTTP host header injection due to improperly validated host headers. This could cause a victim to receive malformed content.
Frequently asked questions
- What is CVE-2021-20101?
- Machform prior to version 16 is vulnerable to HTTP host header injection due to improperly validated host headers. This could cause a victim to receive malformed content.
- How severe is CVE-2021-20101?
- CVE-2021-20101 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-20101 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-20101?
- CVE-2021-20101 affects Machform. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-20101?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-20101 published?
- CVE-2021-20101 was published on 2021-06-29 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:machform:machform:*:*:*:*:*:*:*:*
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