CVE-2021-46433Network attack vector

Arbitrary PHP execution via sandbox bypass

Published Mar 28, 2022 · Updated Aug 4, 2024

Sandbox bypass in Fenom 2.12.1 and earlier allows remote attackers to execute arbitrary PHP code through crafted templates. Template::getTemplateCode compiles template-controlled content into executable PHP without preserving the disable_native_funcs restriction. Exploitation requires an application to compile attacker-controlled templates with disable_native_funcs enabled, after which code runs in the PHP process context.

CVSS severity10.0
Critical
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox bypass in Fenom 2.12.1 and earlier allows remote attackers to execute arbitrary PHP code through crafted templates. Template::getTemplateCode compiles template-controlled content into executable PHP without preserving the disable_native_funcs restriction. Exploitation requires an application to compile attacker-controlled templates with disable_native_funcs enabled, after which code runs in the PHP process context.

The record

CVE
CVE-2021-46433
Published
Mar 28, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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

Weakness, pattern, technique

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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