CVE-2021-23258Network attack vector

Authenticated command execution via unrestricted SpEL

Published Dec 2, 2021 · Updated Sep 16, 2024

Expression language injection in CrafterCMS 3.1 before 3.1.12 allows remote authenticated users to execute OS commands through SpEL. Crafter Studio evaluates attacker-supplied SpEL expressions in Spring beans without a restricted evaluation context. Administrator or Developer access is required, and successful exploitation runs arbitrary commands with the server process's privileges.

CVSS severity4.2
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Expression language injection in CrafterCMS 3.1 before 3.1.12 allows remote authenticated users to execute OS commands through SpEL. Crafter Studio evaluates attacker-supplied SpEL expressions in Spring beans without a restricted evaluation context. Administrator or Developer access is required, and successful exploitation runs arbitrary commands with the server process's privileges.

The record

CVE
CVE-2021-23258
Published
Dec 2, 2021
Updated
Sep 16, 2024
Vendor
Crafter Software Corporation
Product
CrafterCMS
Classifications
CWE-913, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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 <3.1.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Crafter Software Corporation · CrafterCMSversion=3.1 <3.1.12

Published CVSS scores

4.2Crafter Software CorporationCVSS:3.1/AV:N/AC:H/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.

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-913Improper Control of Dynamically-Managed Code Resources
T1059Command and Scripting Interpreter

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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