Vulnerability · Published Jun 11, 2026 · Assigned by GitHub_M

CVE-2026-47171Quest Bot: Reminder messages allow stored mass mentions through `@everyone` and `@here`

High 8.8

In plain English

A high-severity security flaw in quest-bot from duck-organization. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 4.0)8.8High

Exploit odds (30 days)0.4%top 64.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Quest Bot is an opensource modern Discord Bot built for moderation, utilities and support. Prior to version 1.0.3, a normal user can create a reminder whose message contains @everyone or @here. When the reminder triggers, the bot sends the stored message back into the channel without suppressing mass mentions. If the bot has permission to mention everyone, the reminder can ping the entire server or channel later. This issue has been patched in version 1.0.3.

Affected products (as reported)

Vendor	Product	Versions
duck-organization	quest-bot	< 1.0.3

Weakness: CWE-116 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

References

https://github.com/duck-organization/questbot/security/advisories/GHSA-vmgg-f3m4-6fcv x_refsource_CONFIRM
https://github.com/duck-organization/questbot/releases/tag/questbot-v1.0.3 x_refsource_MISC