unprivileged user can access priviledged action in MH-WikiBot

published 2020-04-07 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-26489

cvss: 8.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

mh-wikibot_project mh-wikibot 2020-04-06

Exploit prediction

0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD	2.0	6.4	AV:N/AC:L/Au:N/C:P/I:P/A:N

Affected products

examknow MH-WikiBot

Classification

Weakness

CWE-284 Improper Access Control
CWE-269 Improper Privilege Management

References

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

Sources

CVE List CVE-2020-5302
NVD CVE-2020-5302

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.

Summary