CVE-2020-5302: unprivileged user can access priviledged action in MH-WikiBot

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-07 · updated 2026-06-17
Weakness: CWE-284

Description

MH-WikiBot (an IRC Bot for interacting with the Miraheze API), had a bug that allowed any unprivileged user to access the steward commands on the IRC interface by impersonating the Nickname used by a privileged user as no check was made to see if they were logged in. The issue has been fixed in commit 23d9d5b0a59667a5d6816fdabb960b537a5f9ed1.

Affected products

examknow MH-WikiBot: before 2020-04-06 — fixed in 2020-04-06

How to fix

Upgrade to a fixed version: examknow MH-WikiBot 2020-04-06. Check the vendor advisory for mitigations.

References

https://github.com/examknow/MH-WikiBot/compare/2eac90d...1a62da1
https://github.com/examknow/MH-WikiBot/security/advisories/GHSA-7hf3-wvp8-34r9
https://github.com/examknow/MH-WikiBot/compare/2eac90d...1a62da1
https://github.com/examknow/MH-WikiBot/security/advisories/GHSA-7hf3-wvp8-34r9

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