CVE-2020-1960

A vulnerability in Apache Flink (1.1.0 to 1.1.5, 1.2.0 to 1.2.1, 1.3.0 to 1.3.3, 1.4.0 to 1.4.2, 1.5.0 to 1.5.6, 1.6.0 to 1.6.4, 1.7.0 to 1.7.2, 1.8.0 to 1.8.3, 1.9.0 to 1.9.2, 1.10.0) where, when running a process with an enabled JMXReporter, with a port configured via metrics.reporter.reporter_name>.port, an attacker with local access to the machine and JMX port can execute a man-in-the-middle attack using a specially crafted request to rebind the JMXRMI registry to one under the attacker's control. This compromises any connection established to the process via JMX, allowing extraction of credentials and any other transferred data.

Published: 2020-05-14 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-1960 is rated Low Risk (38.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.86%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-1960

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.10% 0.86% +0.77%
2 2025-03-17 0.04% 0.10% +0.05%
3 2023-03-07 — 0.04% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-1960

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.7 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.0 3.6 [email protected]
1.9 2.0 LOW
AV:L/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.4 2.9 [email protected]

Weakness enumeration for CVE-2020-1960

GitHub Security Advisory for CVE-2020-1960

GHSA-6g88-99wj-8mgg · Severity: medium · Ecosystem: maven — Command injection in Apache Flink

OS Trackers for CVE-2020-1960

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2020-1960

Affected software / configurations for CVE-2020-1960

Vendor Product Version Raw CPE
apache flink >= 1.1.0, <= 1.1.5 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink >= 1.2.0, <= 1.2.1 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink >= 1.3.0, <= 1.3.3 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink >= 1.4.0, <= 1.4.2 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink >= 1.5.0, <= 1.5.6 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink >= 1.6.0, <= 1.6.4 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink >= 1.7.0, <= 1.7.2 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink >= 1.8.0, <= 1.8.3 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink >= 1.9.0, <= 1.9.2 cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
apache flink 1.10.0 cpe:2.3:a:apache:flink:1.10.0:-:*:*:*:*:*:*

References for CVE-2020-1960

cvelogic Threat Intelligence