What is CVE-2021-42133?

CVE-2021-42133 is a high-severity vulnerability in Ivanti Avalanche, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.1/10. Published 2021-12-07.

How severe is CVE-2021-42133?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2021-42133 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Ivanti Avalanche

CVE-2021-42133

An exposed dangerous function vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to perform an arbitrary file write.

Vulnerability class: Unrestricted File Upload

EPSS: 0.028 (85.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Ivanti Avalanche
N/a Ivanti Avalanche — versions 6.3.3

Weakness classification (CWE)

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

support@hackerone.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-42133?: CVE-2021-42133 is a high-severity vulnerability in Ivanti Avalanche, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.1/10. Published 2021-12-07.
How severe is CVE-2021-42133?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2021-42133 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.