CVE-2021-40373Public exploitNetwork attack vector

Authenticated code execution via stored PHP content

Published Sep 10, 2021 · Updated Aug 4, 2024

Code injection in playSMS before 1.4.5 allows remote authenticated users to execute arbitrary PHP through the information-page setting. The core_main_config page stores PHP supplied as information content without blocking executable syntax, and loading core_welcome executes that stored code. Exploitation requires administrator access to change the main configuration and runs the payload with the web server process privileges.

CVSS severity9.8
Critical
EPSS probability4.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in playSMS before 1.4.5 allows remote authenticated users to execute arbitrary PHP through the information-page setting. The core_main_config page stores PHP supplied as information content without blocking executable syntax, and loading core_welcome executes that stored code. Exploitation requires administrator access to change the main configuration and runs the payload with the web server process privileges.

The record

CVE
CVE-2021-40373
Published
Sep 10, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 10, 2021CVE 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/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
Privilegesadmin
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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