CVE-2020-5302: MH-WikiBot (an IRC Bot for interacting with the Miraheze API), had a bug that allowed any unprivileged user to

Q: How do I fix CVE-2020-5302?

mh-wikibot: upgrade to 2020-04-06. Exact commands for each OS are on this page.

Q: Is CVE-2020-5302 being exploited?

CVE-2020-5302 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-5302 affect?

CVE-2020-5302 affects mh-wikibot. Severity is high (CVSS 8.2). 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

This month

HIGH 8.2UPGRADE

CVE-2020-5302 is a high-severity flaw (CVSS 8.2) affecting mh-wikibot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-284, CWE-269
Published	2020-04-07
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: mh-wikibot project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-04-07 16:15 UTCPublished CVE record published
2026-06-17 03:21 UTCUpdated Record last modified

mh-wikibot project mh-wikibot UPGRADE

Affected: < 2020-04-06

Fixed in: 2020-04-06

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mh-wikibot || rpm -q mh-wikibot || mh-wikibot --version

2. UPGRADE to 2020-04-06 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mh-wikibot

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mh-wikibot

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-5302?

mh-wikibot: upgrade to 2020-04-06. Exact commands for each OS are on this page.

Is CVE-2020-5302 being exploited?

CVE-2020-5302 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-5302 affect?

CVE-2020-5302 affects mh-wikibot. Severity is high (CVSS 8.2). 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

How urgent is CVE-2020-5302?

Priority 44/100. High severity

References

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