CVE-2022-25581

Code execution via crafted text-file upload

Published Mar 18, 2022 · Updated Aug 3, 2024

Unrestricted file upload in ClassCMS 2.5 and earlier allows attackers to execute code by supplying a crafted .txt file to classupload. The \class\classupload component accepts the crafted text file as an upload and permits its contents to reach an execution path, although the exact faulty function is undisclosed. NVD characterizes exploitation as local and requiring user interaction, so execution depends on victim interaction rather than a demonstrated unauthenticated web request.

CVSS severity7.8
High
EPSS probability1.18%
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 ClassCMS 2.5 and earlier allows attackers to execute code by supplying a crafted .txt file to classupload. The \class\classupload component accepts the crafted text file as an upload and permits its contents to reach an execution path, although the exact faulty function is undisclosed. NVD characterizes exploitation as local and requiring user interaction, so execution depends on victim interaction rather than a demonstrated unauthenticated web request.

The record

CVE
CVE-2022-25581
Published
Mar 18, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1105
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2022CVE 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST National Vulnerability DatabaseAV: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.

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

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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