CVE-2026-47171Public exploitNetwork attack vector

Delayed mass notifications via unsuppressed reminder mentions

Published Jun 11, 2026 · Updated Jun 11, 2026

Output escaping failure in Quest Bot before 1.0.3 allows remote authenticated users to trigger delayed mass notifications through reminders. The reminder scheduler stores user-controlled message text and later posts it to a guild channel without sanitizing it or disabling @everyone and @here mentions. Any guild member with access to the reminder command can exploit it when the bot has permission to mention everyone, disrupting the channel with bot-originated pings.

CVSS severity5.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Output escaping failure in Quest Bot before 1.0.3 allows remote authenticated users to trigger delayed mass notifications through reminders. The reminder scheduler stores user-controlled message text and later posts it to a guild channel without sanitizing it or disabling @everyone and @here mentions. Any guild member with access to the reminder command can exploit it when the bot has permission to mention everyone, disrupting the channel with bot-originated pings.

The record

CVE
CVE-2026-47171
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
Vantern
Product
Quest Bot
Classifications
CWE-116
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Vantern · Quest Botversion=< 1.0.3

Published CVSS scores

5.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo