CVE-2021-37522: SQL injection vulnerability in HKing2802 Locke-Bot 2.0.2 allows remote attackers to run arbitrary SQL commands

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-37522 is a critical-severity flaw (CVSS 9.8) affecting locke-bot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL injection vulnerability in HKing2802 Locke-Bot 2.0.2 allows remote attackers to run arbitrary SQL commands via crafted string to /src/db.js, /commands/mute.js, /modules/event/messageDelete.js.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-89
Published	2023-07-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: locke-bot project

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

Am I affected?

Timeline

2023-07-18 18:15 UTCPublished CVE record published
2026-06-17 04:00 UTCUpdated Record last modified

locke-bot project locke-bot DOWNGRADE

Affected: 2.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.2

1. Check installed version

apt-cache policy locke-bot || rpm -q locke-bot || locke-bot --version

2. No fixed release: DOWNGRADE to a release before 2.0.2 (Debian / Ubuntu)

apt-cache madison locke-bot sudo apt install locke-bot=<VERSION_BEFORE_2.0.2> sudo apt-mark hold locke-bot

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list locke-bot sudo dnf downgrade locke-bot-<VERSION_BEFORE_2.0.2> sudo dnf versionlock add locke-bot

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-37522?

locke-bot: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-37522 being exploited?

CVE-2021-37522 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-2021-37522 affect?

CVE-2021-37522 affects locke-bot. Severity is critical (CVSS 9.8). SQL injection vulnerability in HKing2802 Locke-Bot 2.0.2 allows remote attackers to run arbitrary SQL commands via crafted string to /src/db.js, /commands/mute.js, /modules/event/messageDelete.js.

How urgent is CVE-2021-37522?

Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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