CVE-2020-6939

Tableau Server installations configured with Site-Specific SAML that allows the APIs to be used by unauthenticated users. If exploited, this could allow a malicious user to configure Site-Specific SAML settings and could lead to account takeover for users of that site. Tableau Server versions affected on both Windows and Linux are: 2018.2 through 2018.2.27, 2018.3 through 2018.3.24, 2019.1 through 2019.1.22, 2019.2 through 2019.2.18, 2019.3 through 2019.3.14, 2019.4 through 2019.4.13, 2020.1 through 2020.1.10, 2020.2 through 2020.2.7, and 2020.3 through 2020.3.2.

Published: 2020-11-23 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-6939 is rated High Risk (66.1/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.80%). High exploitation likelihood—assess exposure and prioritize remediation.

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-2020-6939

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 1.35% 1.80% +0.45%
2 2025-05-07 1.25% 1.35% +0.11%
3 2025-03-30 — 1.25% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-6939

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2020-6939

Affected software / configurations for CVE-2020-6939

Vendor Product Version Raw CPE
tableau tableau_server >= 2018.2, <= 2018.2.27 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*
tableau tableau_server >= 2018.3, <= 2018.3.24 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*
tableau tableau_server >= 2019.1, <= 2019.1.22 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*
tableau tableau_server >= 2019.2, <= 2019.2.18 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*
tableau tableau_server >= 2019.3, <= 2019.3.14 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*
tableau tableau_server >= 2019.4, <= 2019.4.13 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*
tableau tableau_server >= 2020.1, <= 2020.1.10 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*
tableau tableau_server >= 2020.2, <= 2020.2.7 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*
tableau tableau_server >= 2020.3, <= 2020.3.2 cpe:2.3:a:tableau:tableau_server:*:*:*:*:*:*:*:*

References for CVE-2020-6939

cvelogic Threat Intelligence