Is CVE-2020-1955 actively exploited?

No active exploitation of CVE-2020-1955 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-1955 be exploited remotely?

Yes. CVE-2020-1955 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-1955?

CVE-2020-1955 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-1955

CRITICAL

CVE-2020-1955

CWE-306Published: May 20, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

CouchDB version 3.0.0 shipped with a new configuration setting that governs access control to the entire database server called `require_valid_user_except_for_up`. It was meant as an extension to the long standing setting `require_valid_user`, which in turn requires that any and all requests to CouchDB will have to be made with valid credentials, effectively forbidding any anonymous requests. The new `require_valid_user_except_for_up` is an off-by-default setting that was meant to allow requiring valid credentials for all endpoints except for the `/_up` endpoint. However, the implementation of this made an error that lead to not enforcing credentials on any endpoint, when enabled. CouchDB versions 3.0.1[1] and 3.1.0[2] fix this issue.

NVD Source

Technical Analysis

CVE-2020-1955 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.