CVE-2021-24347Public exploitNetwork attack vector

Authenticated code execution via case-sensitive extension filter

Published Jun 14, 2021 · Updated Aug 3, 2024

Unrestricted file upload in Smarty Pants Plugins SP Project & Document Manager before 4.22 allows remote authenticated users to execute PHP. The upload filter compares filename extensions case-sensitively, so a mixed-case extension such as pHP bypasses the PHP-file block. Any account permitted to upload files can place a web shell in its predictable upload directory and execute commands with the web server's privileges.

CVSS severity8.8
High
EPSS probability54.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Smarty Pants Plugins SP Project & Document Manager before 4.22 allows remote authenticated users to execute PHP. The upload filter compares filename extensions case-sensitively, so a mixed-case extension such as pHP bypasses the PHP-file block. Any account permitted to upload files can place a web shell in its predictable upload directory and execute commands with the web server's privileges.

The record

CVE
CVE-2021-24347
Published
Jun 14, 2021
Updated
Aug 3, 2024
Vendor
Smarty Pants Plugins
Product
SP Project & Document Manager
Classifications
CWE-178, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 14, 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?

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

  1. Affected versionversion=4.22 <4.22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Smarty Pants Plugins · SP Project & Document Managerversion=4.22 <4.22

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/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.

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 exploitPublished

Weakness, pattern, technique

CWE-178Improper Handling of Case Sensitivity
T1505.003Web Shell

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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