CVE-2021-32924Public exploitNetwork attack vector

Authenticated PHP execution via unsafe block preview

Published Jun 1, 2021 · Updated Aug 3, 2024

PHP code injection in Invision Community before 4.6.0 allows remote authenticated users to execute arbitrary PHP through block preview. The previewBlock method passes attacker-controlled block_content to IPS_Theme::runProcessFunction, which evaluates it as PHP without adequate validation. Exploitation requires sidebar-management permission, such as Moderator or Administrator, and the CMS application to be enabled.

CVSS severity8.8
High
EPSS probability19.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP code injection in Invision Community before 4.6.0 allows remote authenticated users to execute arbitrary PHP through block preview. The previewBlock method passes attacker-controlled block_content to IPS_Theme::runProcessFunction, which evaluates it as PHP without adequate validation. Exploitation requires sidebar-management permission, such as Moderator or Administrator, and the CMS application to be enabled.

The record

CVE
CVE-2021-32924
Published
Jun 1, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 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-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter

Public exploit references

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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