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HIGH severity

Improper Input Validation in sopel-plugins.channelmgntGHSA-23c7-6444-399m

HIGHFix: MirahezeBots/sopel-channelmgnt@6433883

GHSA-23c7-6444-399m is a high-severity (CVSS 7.6) Improper Input Validation vulnerability in sopel-plugins-channelmgnt. A fix is available for sopel-plugins-channelmgnt — see the affected versions and patch details below.

Also known asCVE-2021-21431PYSEC-2021-58
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs64th percentile — riskier than 64% of all scored CVEsHighest risk
0.00%0.53%1.05%1.58%0.3%1.1%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-23c7-6444-399m by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐍sopel-plugins-channelmgnt

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Impact

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.

Patches

Upgrade to 2.0.1 or higher

Workarounds

Do not use this plugin on networks where TARGMAX > 1.

For more information

If you have any questions or comments about this advisory:

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIsopel-plugins-channelmgntall versions2.0.1pip install --upgrade 'sopel-plugins-channelmgnt==2.0.1'

Affected Products

1 product · 1 configurations
Application
channelmgntmirahezebots
< 2.0.1
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for sopel-plugins-channelmgnt, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update sopel-plugins-channelmgnt to 2.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-23c7-6444-399m is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### Impact 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. ### Patches Upgrade to 2.0.1 or higher ### Workarounds Do not use this plugin on networks where TARGMAX > 1. ### For more information If you have any questions or comments about this advisory: * Open an issue on [phab](https://phab.mirahezebots.org/man
O3 Security · Impact-Aware SCA

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Improper Input Validation in sopel-plugins.channelmgnt