CVE-2021-21431 - CVE House

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Status published High CVE-2021-21431

Improper Input Validation in sopel-plugins.channelmgnt

7.6 CVSS

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from MirahezeBots

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Privilege Escalation in Channelmgnt plug-in for Sopel

Affected Vendor

MirahezeBots

View all reports →

Affected Software

sopel-channelmgnt

Vulnerable Versions:

< 2.0.1

Timeline

Official Publish: April 9th, 2021

Last Modified: August 3rd, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1059 Command and Scripting Interpreter

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1213 Data from Information Repositories

T1565.002 Stored Data Manipulation

T1078 Valid Accounts