CVE-2021-21431 json
Improper Input Validation in sopel-plugins.channelmgnt
published 2021-04-09 5 y ago modified 2026-07-13 3 mo ago also GHSA-23c7-6444-399m , PYSEC-2021-58 , EUVD-2021-0248
- cvss
- 7.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi sopel-plugins-channelmgnt 2.0.1
- mirahezebots channelmgnt 2.0.1
Exploit prediction
1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.6 | CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:H |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:H |
| NVD | 2.0 | 5.5 | AV:N/AC:L/Au:S/C:N/I:P/A:P |
| GitHub | 3.1 | 7.6 | CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | sopel-plugins-channelmgnt | <2.0.1 |
2.0.1 |
Affected products
- MirahezeBots sopel-channelmgnt
Classification
References
-
github.com
/MirahezeBots/sopel-channelmgnt/commit/7c96d400358221e59135f0a0be0744f3fad73856
web, patch, third-party-advisory
-
github.com
/MirahezeBots/sopel-channelmgnt/commit/643388365f28c5cc682254ab913c401f0e53260a
web
-
pypi.org
/project/sopel-plugins.channelmgnt/
product, third-party-advisory, package
-
github.com
/MirahezeBots/sopel-channelmgnt/security/advisories/GHSA-23c7-6444-399m
web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-21431
advisory
-
github.com
/MirahezeBots/sopel-channelmgnt
package
-
github.com
/pypa/advisory-database/tree/main/vulns/sopel-plugins-channelmgnt/PYSEC-2021-58.yaml
web
-
pypi.org
/project/sopel-plugins.channelmgnt
web
Sources
- CVE List CVE-2021-21431
- GitHub Advisory GHSA-23c7-6444-399m
- NVD CVE-2021-21431
- OSV PYSEC-2021-58
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.