CVE-2021-23261Network attack vector

Service interruption via system configuration overwrite

Published Dec 2, 2021 · Updated Sep 17, 2024

Improper exceptional-condition handling in CrafterCMS 3.1 before 3.1.13 allows remote authenticated users to interrupt service. Crafter Software has not published which configuration-writing handler accepts the overwrite or which exceptional condition goes unhandled. Administrator privileges are required, and overwriting the system configuration interrupts availability without reported data exposure or code execution.

CVSS severity4.9
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper exceptional-condition handling in CrafterCMS 3.1 before 3.1.13 allows remote authenticated users to interrupt service. Crafter Software has not published which configuration-writing handler accepts the overwrite or which exceptional condition goes unhandled. Administrator privileges are required, and overwriting the system configuration interrupts availability without reported data exposure or code execution.

The record

CVE
CVE-2021-23261
Published
Dec 2, 2021
Updated
Sep 17, 2024
Vendor
Crafter Software Corporation
Product
CrafterCMS
Classifications
CWE-703, T1499
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=3.1 <3.1.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Crafter Software Corporation · CrafterCMSversion=3.1 <3.1.13

Published CVSS scores

4.9NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.0NVDAV:N/AC:L/Au:S/C:N/I:N/A:P
4.5Crafter Software CorporationCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-703Improper Check or Handling of Exceptional Conditions
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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