What is the CVSS score of CVE-2021-21431?

CVE-2021-21431 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:H. EPSS exploitation probability: 1.1%.

Is there a patch available for CVE-2021-21431?

Yes, a patch is available for CVE-2021-21431. Update the affected software to the latest version immediately.

Channelmgnt CVE-2021-21431

HIGH

Improper Input Validation (CWE-20)

2021-04-09 security-advisories@github.com

Authentication Bypass Channelmgnt

8.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.1 HIGH

AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Apr 09, 2021 - 16:15 nvd

HIGH 8.1

DescriptionNVD

sopel-channelmgnt is a channelmgnt plugin for sopel. In versions prior to 2.0.1, on some IRC servers, restrictions around the removal of the bot using the kick/kickban command could be bypassed when kicking multiple users at once. We also believe it may have been possible to remove users from other channels but due to the wonder that is IRC and following RfCs, We have no POC for that. Freenode is not affected. This is fixed in version 2.0.1. As a workaround, do not use this plugin on networks where TARGMAX > 1.

AnalysisAI

sopel-channelmgnt is a channelmgnt plugin for sopel. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-20. sopel-channelmgnt is a channelmgnt plugin for sopel. In versions prior to 2.0.1, on some IRC servers, restrictions around the removal of the bot using the kick/kickban command could be bypassed when kicking multiple users at once. We also believe it may have been possible to remove users from other channels but due to the wonder that is IRC and following RfCs, We have no POC for that. Freenode is not affected. This is fixed in version 2.0.1. As a workaround, do not use this plugin on networks where TARGMAX > 1. Affected products include: Mirahezebots Channelmgnt. Version information: prior to 2.0.1.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.