CVE-2024-21624Network attack vector

Information disclosure via private attribute traversal

Published Feb 9, 2024 · Updated Aug 1, 2024

Format-string injection in NoneBot2 2.0.0a16 through 2.1.3 allows remote authenticated users to disclose sensitive process data. MessageTemplate passes attacker-controlled replacement fields to Python Formatter attribute traversal without blocking private names, allowing chains such as init to reach protected object state. Exploitation requires an application developer to incorporate user-provided data into a message template and user interaction in the affected bot workflow; exposed data can include environment variables.

CVSS severity5.7
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Format-string injection in NoneBot2 2.0.0a16 through 2.1.3 allows remote authenticated users to disclose sensitive process data. MessageTemplate passes attacker-controlled replacement fields to Python Formatter attribute traversal without blocking private names, allowing chains such as init to reach protected object state. Exploitation requires an application developer to incorporate user-provided data into a message template and user interaction in the affected bot workflow; exposed data can include environment variables.

The record

CVE
CVE-2024-21624
Published
Feb 9, 2024
Updated
Aug 1, 2024
Vendor
NoneBot
Product
NoneBot2
Classifications
CWE-1336, CWE-200
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=>= 2.0.0a16, < 2.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

NoneBot · NoneBot2version=>= 2.0.0a16, < 2.2.0

Published CVSS scores

5.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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