CVE-2021-25857Public exploitNetwork attack vector

Authenticated code execution via PHP settings injection

Published Aug 11, 2023 · Updated Oct 9, 2024

Code injection in pcmt superMicro-CMS 3.11 allows remote authenticated users to execute arbitrary code through setup.php's font_type input. setup.php interpolates the unfiltered POST value into a PHP define statement and overwrites inc/settings.php with the generated content. Administrator access to the management backend is required, and successful injection executes attacker-supplied PHP in the web server context.

CVSS severity7.2
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Code injection in pcmt superMicro-CMS 3.11 allows remote authenticated users to execute arbitrary code through setup.php's font_type input. setup.php interpolates the unfiltered POST value into a PHP define statement and overwrites inc/settings.php with the generated content. Administrator access to the management backend is required, and successful injection executes attacker-supplied PHP in the web server context.

The record

CVE
CVE-2021-25857
Published
Aug 11, 2023
Updated
Oct 9, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1505.003Server Software Component Web Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo