CVE-2020-18439Public exploitNetwork attack vector

Remote code execution via template path traversal

Published Nov 2, 2021 · Updated Aug 4, 2024

Arbitrary file write in qinggan PHPok 5.1 allows remote attackers to create executable server files through the template editor. The edit_save_f function in framework/admin/tpl_control.php uses an attacker-controlled title as a destination path without blocking traversal and writes supplied content there. A crafted network request can overwrite a PHP file and execute supplied code in the web-server context without user interaction.

CVSS severity9.1
Critical
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file write in qinggan PHPok 5.1 allows remote attackers to create executable server files through the template editor. The edit_save_f function in framework/admin/tpl_control.php uses an attacker-controlled title as a destination path without blocking traversal and writes supplied content there. A crafted network request can overwrite a PHP file and execute supplied code in the web-server context without user interaction.

The record

CVE
CVE-2020-18439
Published
Nov 2, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1505.003, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 2, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.4NVDAV:N/AC:L/Au:N/C:P/I:P/A:N
9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1505.003Web Shell
T1190Exploit Public-Facing Application

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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