What is CVE-2021-42125?

CVE-2021-42125 is a high-severity vulnerability in Ivanti Avalanche, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2021-12-07.

How severe is CVE-2021-42125?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-42125 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-2021-42125

An unrestricted file upload vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to write dangerous files.

Vulnerability class: Insecure Deserialization

EPSS: 0.816 (99.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ivanti Avalanche
N/a Ivanti Avalance — 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-2021-42125?: CVE-2021-42125 is a high-severity vulnerability in Ivanti Avalanche, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2021-12-07.
How severe is CVE-2021-42125?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-42125 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.